145572008521 has 27 divisors (see below), whose sum is σ = 157630520781. Its totient is φ = 134414663544.

The previous prime is 145572008507. The next prime is 145572008539. The reversal of 145572008521 is 125800275541.

The square root of 145572008521 is 381539.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 145572008521 - 2⁵ = 145572008489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145572008551) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 311717130 + ... + 311717596.

Almost surely, 2^145572008521 is an apocalyptic number.

145572008521 is the 381539-th square number.

145572008521 is the 190770-th centered octagonal number.

It is an amenable number.

145572008521 is a deficient number, since it is larger than the sum of its proper divisors (12058512260).

145572008521 is an frugal number, since it uses more digits than its factorization.

145572008521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 145572008521 in words is "one hundred forty-five billion, five hundred seventy-two million, eight thousand, five hundred twenty-one".