11722645031 has 4 divisors (see below), whose sum is σ = 12126874200. Its totient is φ = 11318415864.

The previous prime is 11722645007. The next prime is 11722645073. The reversal of 11722645031 is 13054622711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11722645031 - 2¹⁰ = 11722644007 is a prime.

It is a super-2 number, since 2×11722645031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722647031) 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, 202114541 + ... + 202114598.

It is an arithmetic number, because the mean of its divisors is an integer number (3031718550).

Almost surely, 2^11722645031 is an apocalyptic number.

11722645031 is a deficient number, since it is larger than the sum of its proper divisors (404229169).

11722645031 is an equidigital number, since it uses as much as digits as its factorization.

11722645031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404229168.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 11722645031 in words is "eleven billion, seven hundred twenty-two million, six hundred forty-five thousand, thirty-one".