252505621520 has 40 divisors (see below), whose sum is σ = 587170472256. Its totient is φ = 100985921408.

The previous prime is 252505621451. The next prime is 252505621547. The reversal of 252505621520 is 25126505252.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×252505621520² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249059 + ... + 753021.

Almost surely, 2^252505621520 is an apocalyptic number.

252505621520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252505621520 is an abundant number, since it is smaller than the sum of its proper divisors (334664850736).

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

252505621520 is a wasteful number, since it uses less digits than its factorization.

252505621520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510239 (or 510233 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 252505621520 in words is "two hundred fifty-two billion, five hundred five million, six hundred twenty-one thousand, five hundred twenty".