13225731761 has 4 divisors (see below), whose sum is σ = 14428071024. Its totient is φ = 12023392500.

The previous prime is 13225731737. The next prime is 13225731763. The reversal of 13225731761 is 16713752231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13225731761 - 2²² = 13221537457 is a prime.

It is a super-2 number, since 2×13225731761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13225731763) 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, 601169615 + ... + 601169636.

It is an arithmetic number, because the mean of its divisors is an integer number (3607017756).

Almost surely, 2^13225731761 is an apocalyptic number.

13225731761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13225731761 is a deficient number, since it is larger than the sum of its proper divisors (1202339263).

13225731761 is a wasteful number, since it uses less digits than its factorization.

13225731761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202339262.

The product of its digits is 52920, while the sum is 38.

The spelling of 13225731761 in words is "thirteen billion, two hundred twenty-five million, seven hundred thirty-one thousand, seven hundred sixty-one".