51457859 has 4 divisors (see below), whose sum is σ = 52428816. Its totient is φ = 50486904.

The previous prime is 51457843. The next prime is 51457891. The reversal of 51457859 is 95875415.

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 51457859 - 2⁴ = 51457843 is a prime.

It is a super-2 number, since 2×51457859² = 5295822505727762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51457559) 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, 485399 + ... + 485504.

It is an arithmetic number, because the mean of its divisors is an integer number (13107204).

Almost surely, 2^51457859 is an apocalyptic number.

51457859 is a deficient number, since it is larger than the sum of its proper divisors (970957).

51457859 is an equidigital number, since it uses as much as digits as its factorization.

51457859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970956.

The product of its digits is 252000, while the sum is 44.

The square root of 51457859 is about 7173.4133437297. The cubic root of 51457859 is about 371.9494357411.

The spelling of 51457859 in words is "fifty-one million, four hundred fifty-seven thousand, eight hundred fifty-nine".