11931944331 has 16 divisors (see below), whose sum is σ = 15965827488. Its totient is φ = 7926374400.

The previous prime is 11931944317. The next prime is 11931944413. The reversal of 11931944331 is 13344913911.

It is not a de Polignac number, because 11931944331 - 2⁷ = 11931944203 is a prime.

It is a super-2 number, since 2×11931944331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11931944331.

It is not an unprimeable number, because it can be changed into a prime (11931944131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3072511 + ... + 3076391.

It is an arithmetic number, because the mean of its divisors is an integer number (997864218).

Almost surely, 2^11931944331 is an apocalyptic number.

11931944331 is a deficient number, since it is larger than the sum of its proper divisors (4033883157).

11931944331 is a wasteful number, since it uses less digits than its factorization.

11931944331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7262.

The product of its digits is 34992, while the sum is 39.

The spelling of 11931944331 in words is "eleven billion, nine hundred thirty-one million, nine hundred forty-four thousand, three hundred thirty-one".