52397551 has 4 divisors (see below), whose sum is σ = 53179672. Its totient is φ = 51615432.

The previous prime is 52397537. The next prime is 52397567. The reversal of 52397551 is 15579325.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52397551 - 2²⁵ = 18843119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52397551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52397531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390960 + ... + 391093.

It is an arithmetic number, because the mean of its divisors is an integer number (13294918).

Almost surely, 2^52397551 is an apocalyptic number.

52397551 is a deficient number, since it is larger than the sum of its proper divisors (782121).

52397551 is an equidigital number, since it uses as much as digits as its factorization.

52397551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782120.

The product of its digits is 47250, while the sum is 37.

The square root of 52397551 is about 7238.6152681297. The cubic root of 52397551 is about 374.1998964761.

The spelling of 52397551 in words is "fifty-two million, three hundred ninety-seven thousand, five hundred fifty-one".