52502981 has 4 divisors (see below), whose sum is σ = 52855500. Its totient is φ = 52150464.

The previous prime is 52502977. The next prime is 52502999. The reversal of 52502981 is 18920525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8213956 + 44289025 = 2866^2 + 6655^2 .

It is a cyclic number.

It is not a de Polignac number, because 52502981 - 2² = 52502977 is a prime.

It is a super-2 number, since 2×52502981² = 5513126027772722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52502081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176036 + ... + 176333.

It is an arithmetic number, because the mean of its divisors is an integer number (13213875).

Almost surely, 2^52502981 is an apocalyptic number.

It is an amenable number.

52502981 is a deficient number, since it is larger than the sum of its proper divisors (352519).

52502981 is a wasteful number, since it uses less digits than its factorization.

52502981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352518.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 52502981 is about 7245.8940787180. The cubic root of 52502981 is about 374.4507063152.

The spelling of 52502981 in words is "fifty-two million, five hundred two thousand, nine hundred eighty-one".