52981636 has 6 divisors (see below), whose sum is σ = 92717870. Its totient is φ = 26490816.

The previous prime is 52981631. The next prime is 52981651. The reversal of 52981636 is 63618925.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 10601536 = 6510^2 + 3256^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (52981631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6622701 + ... + 6622708.

Almost surely, 2^52981636 is an apocalyptic number.

It is an amenable number.

52981636 is a deficient number, since it is larger than the sum of its proper divisors (39736234).

52981636 is a wasteful number, since it uses less digits than its factorization.

52981636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245413 (or 13245411 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 52981636 is about 7278.8485353111. The cubic root of 52981636 is about 375.5851864912.

The spelling of 52981636 in words is "fifty-two million, nine hundred eighty-one thousand, six hundred thirty-six".