52137021 has 16 divisors (see below), whose sum is σ = 72823680. Its totient is φ = 33116160.

The previous prime is 52137013. The next prime is 52137023. The reversal of 52137021 is 12073125.

It is not a de Polignac number, because 52137021 - 2³ = 52137013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52137023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18045 + ... + 20733.

It is an arithmetic number, because the mean of its divisors is an integer number (4551480).

Almost surely, 2^52137021 is an apocalyptic number.

It is an amenable number.

52137021 is a deficient number, since it is larger than the sum of its proper divisors (20686659).

52137021 is a wasteful number, since it uses less digits than its factorization.

52137021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 52137021 is about 7220.5969974788. The cubic root of 52137021 is about 373.5786694357.

The spelling of 52137021 in words is "fifty-two million, one hundred thirty-seven thousand, twenty-one".