252802521 has 6 divisors (see below), whose sum is σ = 365159210. Its totient is φ = 168535008.

The previous prime is 252802507. The next prime is 252802531. The reversal of 252802521 is 125208252.

It can be written as a sum of positive squares in only one way, i.e., 245705625 + 7096896 = 15675^2 + 2664^2 .

It is not a de Polignac number, because 252802521 - 2¹³ = 252794329 is a prime.

It is a super-2 number, since 2×252802521² = 127818229247910882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252802531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14044576 + ... + 14044593.

Almost surely, 2^252802521 is an apocalyptic number.

It is an amenable number.

252802521 is a deficient number, since it is larger than the sum of its proper divisors (112356689).

252802521 is a wasteful number, since it uses less digits than its factorization.

252802521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28089175 (or 28089172 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 252802521 is about 15899.7648095813. The cubic root of 252802521 is about 632.3057533879.

The spelling of 252802521 in words is "two hundred fifty-two million, eight hundred two thousand, five hundred twenty-one".