51831099 has 6 divisors (see below), whose sum is σ = 74867156. Its totient is φ = 34554060.

The previous prime is 51831071. The next prime is 51831103. The reversal of 51831099 is 99013815.

It is a happy number.

It is not a de Polignac number, because 51831099 - 2⁸ = 51830843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51831049) 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, 2879497 + ... + 2879514.

Almost surely, 2^51831099 is an apocalyptic number.

51831099 is a deficient number, since it is larger than the sum of its proper divisors (23036057).

51831099 is a wasteful number, since it uses less digits than its factorization.

51831099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759017 (or 5759014 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 51831099 is about 7199.3818484645. The cubic root of 51831099 is about 372.8465588475.

The spelling of 51831099 in words is "fifty-one million, eight hundred thirty-one thousand, ninety-nine".