2291156520 has 64 divisors (see below), whose sum is σ = 6879798720. Its totient is φ = 610412544.

The previous prime is 2291156509. The next prime is 2291156537. The reversal of 2291156520 is 256511922.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131352 + ... + 147768.

It is an arithmetic number, because the mean of its divisors is an integer number (107496855).

Almost surely, 2^2291156520 is an apocalyptic number.

2291156520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2291156520 is an abundant number, since it is smaller than the sum of its proper divisors (4588642200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2291156520 is a wasteful number, since it uses less digits than its factorization.

2291156520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17594 (or 17590 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 2291156520 is about 47866.0267830953. The cubic root of 2291156520 is about 1318.3121448083.

The spelling of 2291156520 in words is "two billion, two hundred ninety-one million, one hundred fifty-six thousand, five hundred twenty".