51557059 has 4 divisors (see below), whose sum is σ = 52209760. Its totient is φ = 50904360.

The previous prime is 51557057. The next prime is 51557081. The reversal of 51557059 is 95075515.

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 51557059 - 2¹ = 51557057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51557057) 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, 326232 + ... + 326389.

It is an arithmetic number, because the mean of its divisors is an integer number (13052440).

Almost surely, 2^51557059 is an apocalyptic number.

51557059 is a deficient number, since it is larger than the sum of its proper divisors (652701).

51557059 is an equidigital number, since it uses as much as digits as its factorization.

51557059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652700.

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 51557059 is about 7180.3244355670. The cubic root of 51557059 is about 372.1882959137.

The spelling of 51557059 in words is "fifty-one million, five hundred fifty-seven thousand, fifty-nine".