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13442025031 = 15438711617
BaseRepresentation
bin11001000010011010…
…10000011001000111
31021200210112121210221
430201031100121013
5210012124300111
610101501125211
7654051220231
oct144115203107
937623477727
1013442025031
1157787443a6
122731859807
131362b38786
1491734d251
1553a167371
hex321350647

13442025031 has 4 divisors (see below), whose sum is σ = 13450738192. Its totient is φ = 13433311872.

The previous prime is 13442025007. The next prime is 13442025049. The reversal of 13442025031 is 13052024431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13052024431 = 17767766143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13442025031 is a prime.

It is a super-2 number, since 2×134420250312 (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 = 13442024987 and 13442025005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13442025061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4354266 + ... + 4357351.

It is an arithmetic number, because the mean of its divisors is an integer number (3362684548).

Almost surely, 213442025031 is an apocalyptic number.

13442025031 is a deficient number, since it is larger than the sum of its proper divisors (8713161).

13442025031 is an equidigital number, since it uses as much as digits as its factorization.

13442025031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8713160.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 13442025031 its reverse (13052024431), we get a palindrome (26494049462).

The spelling of 13442025031 in words is "thirteen billion, four hundred forty-two million, twenty-five thousand, thirty-one".

Divisors: 1 1543 8711617 13442025031