51533699 has 4 divisors (see below), whose sum is σ = 58895664. Its totient is φ = 44171736.

The previous prime is 51533663. The next prime is 51533707. The reversal of 51533699 is 99633515.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51533699 - 2¹² = 51529603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51533659) 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, 3680972 + ... + 3680985.

It is an arithmetic number, because the mean of its divisors is an integer number (14723916).

Almost surely, 2^51533699 is an apocalyptic number.

51533699 is a deficient number, since it is larger than the sum of its proper divisors (7361965).

51533699 is an equidigital number, since it uses as much as digits as its factorization.

51533699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7361964.

The product of its digits is 109350, while the sum is 41.

The square root of 51533699 is about 7178.6975838240. The cubic root of 51533699 is about 372.1320757943.

The spelling of 51533699 in words is "fifty-one million, five hundred thirty-three thousand, six hundred ninety-nine".