51557859 has 6 divisors (see below), whose sum is σ = 74472476. Its totient is φ = 34371900.

The previous prime is 51557839. The next prime is 51557873. The reversal of 51557859 is 95875515.

51557859 is a `hidden beast` number, since 515 + 57 + 85 + 9 = 666.

It is not a de Polignac number, because 51557859 - 2⁸ = 51557603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51557819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2864317 + ... + 2864334.

Almost surely, 2^51557859 is an apocalyptic number.

51557859 is a deficient number, since it is larger than the sum of its proper divisors (22914617).

51557859 is a wasteful number, since it uses less digits than its factorization.

51557859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728657 (or 5728654 counting only the distinct ones).

The product of its digits is 315000, while the sum is 45.

The square root of 51557859 is about 7180.3801431401. The cubic root of 51557859 is about 372.1902209595.

The spelling of 51557859 in words is "fifty-one million, five hundred fifty-seven thousand, eight hundred fifty-nine".