215534552232555 has 48 divisors (see below), whose sum is σ = 383704485405696. Its totient is φ = 111855244554240.

The previous prime is 215534552232529. The next prime is 215534552232557. The reversal of 215534552232555 is 555232255435512.

It is a happy number.

215534552232555 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 3 + 4 + 5 + 52 + 2 + 32 + 555 = 666.

It is not a de Polignac number, because 215534552232555 - 2¹⁷ = 215534552101483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215534552232557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151801062 + ... + 153214331.

It is an arithmetic number, because the mean of its divisors is an integer number (7993843445952).

Almost surely, 2^{215534552232555} is an apocalyptic number.

215534552232555 is a deficient number, since it is larger than the sum of its proper divisors (168169933173141).

215534552232555 is a wasteful number, since it uses less digits than its factorization.

215534552232555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305015828 (or 305015825 counting only the distinct ones).

The product of its digits is 45000000, while the sum is 54.

The spelling of 215534552232555 in words is "two hundred fifteen trillion, five hundred thirty-four billion, five hundred fifty-two million, two hundred thirty-two thousand, five hundred fifty-five".