51599898 has 24 divisors (see below), whose sum is σ = 127771488. Its totient is φ = 14742792.

The previous prime is 51599893. The next prime is 51599917. The reversal of 51599898 is 89899515.

It is a super-2 number, since 2×51599898² = 5325098947220808, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51599893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204636 + ... + 204887.

It is an arithmetic number, because the mean of its divisors is an integer number (5323812).

Almost surely, 2^51599898 is an apocalyptic number.

51599898 is an abundant number, since it is smaller than the sum of its proper divisors (76171590).

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

51599898 is a wasteful number, since it uses less digits than its factorization.

51599898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409538 (or 409535 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 54.

The square root of 51599898 is about 7183.3068986366. The cubic root of 51599898 is about 372.2913517042.

The spelling of 51599898 in words is "fifty-one million, five hundred ninety-nine thousand, eight hundred ninety-eight".