252021551055 has 32 divisors (see below), whose sum is σ = 405792688896. Its totient is φ = 133559103744.

The previous prime is 252021551051. The next prime is 252021551083. The reversal of 252021551055 is 550155120252.

It is a happy number.

It is not a de Polignac number, because 252021551055 - 2² = 252021551051 is a prime.

It is a super-2 number, since 2×252021551055² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252021551051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17799859 + ... + 17814011.

It is an arithmetic number, because the mean of its divisors is an integer number (12681021528).

Almost surely, 2^252021551055 is an apocalyptic number.

252021551055 is a deficient number, since it is larger than the sum of its proper divisors (153771137841).

252021551055 is a wasteful number, since it uses less digits than its factorization.

252021551055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21607.

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 252021551055 in words is "two hundred fifty-two billion, twenty-one million, five hundred fifty-one thousand, fifty-five".