52638981 has 8 divisors (see below), whose sum is σ = 70279200. Its totient is φ = 35045712.

The previous prime is 52638977. The next prime is 52639001. The reversal of 52638981 is 18983625.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52638981 - 2² = 52638977 is a prime.

It is a super-2 number, since 2×52638981² = 5541724641436722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52638941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9031 + ... + 13668.

It is an arithmetic number, because the mean of its divisors is an integer number (8784900).

Almost surely, 2^52638981 is an apocalyptic number.

It is an amenable number.

52638981 is a deficient number, since it is larger than the sum of its proper divisors (17640219).

52638981 is a wasteful number, since it uses less digits than its factorization.

52638981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23475.

The product of its digits is 103680, while the sum is 42.

The square root of 52638981 is about 7255.2726344363. The cubic root of 52638981 is about 374.7737444054.

The spelling of 52638981 in words is "fifty-two million, six hundred thirty-eight thousand, nine hundred eighty-one".