13257661031 has 4 divisors (see below), whose sum is σ = 13615976232. Its totient is φ = 12899345832.

The previous prime is 13257661019. The next prime is 13257661033. The reversal of 13257661031 is 13016675231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13016675231 = 7 ⋅1859525033.

It is a cyclic number.

It is not a de Polignac number, because 13257661031 - 2¹⁸ = 13257398887 is a prime.

It is a super-2 number, since 2×13257661031² (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 = 13257660982 and 13257661000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13257661033) 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, 179157545 + ... + 179157618.

It is an arithmetic number, because the mean of its divisors is an integer number (3403994058).

Almost surely, 2^13257661031 is an apocalyptic number.

13257661031 is a deficient number, since it is larger than the sum of its proper divisors (358315201).

13257661031 is an equidigital number, since it uses as much as digits as its factorization.

13257661031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358315200.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 13257661031 in words is "thirteen billion, two hundred fifty-seven million, six hundred sixty-one thousand, thirty-one".