51013816 has 32 divisors (see below), whose sum is σ = 114071040. Its totient is φ = 20911968.

The previous prime is 51013811. The next prime is 51013829. The reversal of 51013816 is 61831015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013811) 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 7 ways as a sum of consecutive naturals, for example, 18516 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (3564720).

Almost surely, 2^51013816 is an apocalyptic number.

51013816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51013816 is an abundant number, since it is smaller than the sum of its proper divisors (63057224).

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

51013816 is a wasteful number, since it uses less digits than its factorization.

51013816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39643 (or 39639 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 51013816 is about 7142.3956765220. The cubic root of 51013816 is about 370.8764612663.

The spelling of 51013816 in words is "fifty-one million, thirteen thousand, eight hundred sixteen".