51135516 has 24 divisors (see below), whose sum is σ = 132573840. Its totient is φ = 17045136.

The previous prime is 51135499. The next prime is 51135529. The reversal of 51135516 is 61553115.

It is a super-2 number, since 2×51135516² = 5229681993172512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51135516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236631 + ... + 236846.

It is an arithmetic number, because the mean of its divisors is an integer number (5523910).

Almost surely, 2^51135516 is an apocalyptic number.

It is an amenable number.

51135516 is an abundant number, since it is smaller than the sum of its proper divisors (81438324).

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

51135516 is a wasteful number, since it uses less digits than its factorization.

51135516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473490 (or 473482 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 51135516 is about 7150.9101518618. The cubic root of 51135516 is about 371.1711515030.

The spelling of 51135516 in words is "fifty-one million, one hundred thirty-five thousand, five hundred sixteen".