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12353031461 = 122771006193
BaseRepresentation
bin10111000000100110…
…00100110100100101
31011212220102000110202
423200103010310211
5200244334001321
65401440200245
7615056014661
oct134023046445
934786360422
1012353031461
115269a67411
122489009085
13121b33c794
148528778a1
154c475770b
hex2e04c4d25

12353031461 has 4 divisors (see below), whose sum is σ = 12354049932. Its totient is φ = 12352012992.

The previous prime is 12353031451. The next prime is 12353031463. The reversal of 12353031461 is 16413035321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16413035321 = 24168103881.

It can be written as a sum of positive squares in 2 ways, for example, as 4732614436 + 7620417025 = 68794^2 + 87295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12353031461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12353031463) 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, 490820 + ... + 515373.

It is an arithmetic number, because the mean of its divisors is an integer number (3088512483).

Almost surely, 212353031461 is an apocalyptic number.

It is an amenable number.

12353031461 is a deficient number, since it is larger than the sum of its proper divisors (1018471).

12353031461 is a wasteful number, since it uses less digits than its factorization.

12353031461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018470.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 12353031461 its reverse (16413035321), we get a palindrome (28766066782).

The spelling of 12353031461 in words is "twelve billion, three hundred fifty-three million, thirty-one thousand, four hundred sixty-one".

Divisors: 1 12277 1006193 12353031461