2031551265555 has 32 divisors (see below), whose sum is σ = 4127596224000. Its totient is φ = 928709149536.

The previous prime is 2031551265533. The next prime is 2031551265571. The reversal of 2031551265555 is 5555621551302.

2031551265555 is a `hidden beast` number, since 2 + 0 + 31 + 5 + 5 + 1 + 2 + 65 + 555 = 666.

It is not a de Polignac number, because 2031551265555 - 2⁷ = 2031551265427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2031551265555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1074893905 + ... + 1074895794.

It is an arithmetic number, because the mean of its divisors is an integer number (128987382000).

Almost surely, 2^{2031551265555} is an apocalyptic number.

2031551265555 is an abundant number, since it is smaller than the sum of its proper divisors (2096044958445).

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

2031551265555 is a wasteful number, since it uses less digits than its factorization.

2031551265555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149789720 (or 2149789714 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 45.

The spelling of 2031551265555 in words is "two trillion, thirty-one billion, five hundred fifty-one million, two hundred sixty-five thousand, five hundred fifty-five".