52786021 has 4 divisors (see below), whose sum is σ = 52801344. Its totient is φ = 52770700.

The previous prime is 52786007. The next prime is 52786051. The reversal of 52786021 is 12068725.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52786021 - 2¹⁹ = 52261733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52786051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186 + ... + 10276.

It is an arithmetic number, because the mean of its divisors is an integer number (13200336).

Almost surely, 2^52786021 is an apocalyptic number.

It is an amenable number.

52786021 is a deficient number, since it is larger than the sum of its proper divisors (15323).

52786021 is a wasteful number, since it uses less digits than its factorization.

52786021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15322.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 52786021 is about 7265.3988878795. The cubic root of 52786021 is about 375.1223802054.

The spelling of 52786021 in words is "fifty-two million, seven hundred eighty-six thousand, twenty-one".