51013116 has 162 divisors, whose sum is σ = 165569040. Its totient is φ = 13194720.

The previous prime is 51013099. The next prime is 51013129. The reversal of 51013116 is 61131015.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 213325 + ... + 213563.

Almost surely, 2^51013116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51013116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82784520).

51013116 is an abundant number, since it is smaller than the sum of its proper divisors (114555924).

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

51013116 is a wasteful number, since it uses less digits than its factorization.

51013116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 51013116 is about 7142.3466731880. The cubic root of 51013116 is about 370.8747648977.

The spelling of 51013116 in words is "fifty-one million, thirteen thousand, one hundred sixteen".