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12254504231 = 77491158141
BaseRepresentation
bin10110110100110110…
…01110010100100111
31011122001000022112002
423122123032110213
5200044123113411
65344000315515
7612451365404
oct133233162447
934561008462
1012254504231
115219391452
122460012b9b
131203ac3448
1484374b2ab
154bac9433b
hex2da6ce527

12254504231 has 4 divisors (see below), whose sum is σ = 12254739864. Its totient is φ = 12254268600.

The previous prime is 12254504203. The next prime is 12254504237. The reversal of 12254504231 is 13240545221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13240545221 = 36107366703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12254504231 is a prime.

It is a super-2 number, since 2×122545042312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12254504194 and 12254504203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12254504237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580 + ... + 156561.

It is an arithmetic number, because the mean of its divisors is an integer number (3063684966).

Almost surely, 212254504231 is an apocalyptic number.

12254504231 is a deficient number, since it is larger than the sum of its proper divisors (235633).

12254504231 is an equidigital number, since it uses as much as digits as its factorization.

12254504231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235632.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 12254504231 in words is "twelve billion, two hundred fifty-four million, five hundred four thousand, two hundred thirty-one".

Divisors: 1 77491 158141 12254504231