52970521 has 6 divisors (see below), whose sum is σ = 56270030. Its totient is φ = 49854336.

The previous prime is 52970507. The next prime is 52970549. The reversal of 52970521 is 12507925.

It can be written as a sum of positive squares in 3 ways, for example, as 31764496 + 21206025 = 5636^2 + 4605^2 .

It is not a de Polignac number, because 52970521 - 2²¹ = 50873369 is a prime.

It is a super-2 number, since 2×52970521² = 5611752190022882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52970581) 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, 91356 + ... + 91933.

Almost surely, 2^52970521 is an apocalyptic number.

It is an amenable number.

52970521 is a deficient number, since it is larger than the sum of its proper divisors (3299509).

52970521 is a wasteful number, since it uses less digits than its factorization.

52970521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183323 (or 183306 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 52970521 is about 7278.0849816418. The cubic root of 52970521 is about 375.5589200234.

The spelling of 52970521 in words is "fifty-two million, nine hundred seventy thousand, five hundred twenty-one".