51069858 has 24 divisors (see below), whose sum is σ = 118816272. Its totient is φ = 14591304.

The previous prime is 51069857. The next prime is 51069881. The reversal of 51069858 is 85896015.

It is a super-2 number, since 2×51069858² = 5216260792280328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (51069857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86560 + ... + 87147.

It is an arithmetic number, because the mean of its divisors is an integer number (4950678).

Almost surely, 2^51069858 is an apocalyptic number.

51069858 is an abundant number, since it is smaller than the sum of its proper divisors (67746414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51069858 is a wasteful number, since it uses less digits than its factorization.

51069858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173726 (or 173719 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 51069858 is about 7146.3177931016. The cubic root of 51069858 is about 371.0122222151.

The spelling of 51069858 in words is "fifty-one million, sixty-nine thousand, eight hundred fifty-eight".