52157387 has 4 divisors (see below), whose sum is σ = 52532760. Its totient is φ = 51782016.

The previous prime is 52157359. The next prime is 52157393. The reversal of 52157387 is 78375125.

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 52157387 - 2¹⁴ = 52141003 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 52157387.

It is not an unprimeable number, because it can be changed into a prime (52157327) 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, 187478 + ... + 187755.

It is an arithmetic number, because the mean of its divisors is an integer number (13133190).

Almost surely, 2^52157387 is an apocalyptic number.

52157387 is a deficient number, since it is larger than the sum of its proper divisors (375373).

52157387 is a wasteful number, since it uses less digits than its factorization.

52157387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375372.

The product of its digits is 58800, while the sum is 38.

The square root of 52157387 is about 7222.0071309851. The cubic root of 52157387 is about 373.6273061024.

The spelling of 52157387 in words is "fifty-two million, one hundred fifty-seven thousand, three hundred eighty-seven".