51599994 has 32 divisors (see below), whose sum is σ = 108380160. Its totient is φ = 16346352.

The previous prime is 51599993. The next prime is 51600007. The reversal of 51599994 is 49999515.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51599993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21927 + ... + 24165.

It is an arithmetic number, because the mean of its divisors is an integer number (3386880).

Almost surely, 2^51599994 is an apocalyptic number.

51599994 is an abundant number, since it is smaller than the sum of its proper divisors (56780166).

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

51599994 is a wasteful number, since it uses less digits than its factorization.

51599994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434.

The product of its digits is 656100, while the sum is 51.

The square root of 51599994 is about 7183.3135807926. The cubic root of 51599994 is about 372.2915825829.

The spelling of 51599994 in words is "fifty-one million, five hundred ninety-nine thousand, nine hundred ninety-four".