2931520991 has 6 divisors (see below), whose sum is σ = 3410136720. Its totient is φ = 2512732236.

The previous prime is 2931520973. The next prime is 2931521011. The reversal of 2931520991 is 1990251392.

It is not a de Polignac number, because 2931520991 - 2⁶ = 2931520927 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 (2931520961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29913431 + ... + 29913528.

It is an arithmetic number, because the mean of its divisors is an integer number (568356120).

Almost surely, 2^2931520991 is an apocalyptic number.

2931520991 is a deficient number, since it is larger than the sum of its proper divisors (478615729).

2931520991 is an equidigital number, since it uses as much as digits as its factorization.

2931520991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59826973 (or 59826966 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 2931520991 is about 54143.5221517773. The cubic root of 2931520991 is about 1431.1912402515.

The spelling of 2931520991 in words is "two billion, nine hundred thirty-one million, five hundred twenty thousand, nine hundred ninety-one".