51169536 has 144 divisors (see below), whose sum is σ = 165318720. Its totient is φ = 15482880.

The previous prime is 51169523. The next prime is 51169567. The reversal of 51169536 is 63596115.

51169536 is a `hidden beast` number, since 5 + 116 + 9 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51169536.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75696 + ... + 76368.

Almost surely, 2^51169536 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 51169536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82659360).

51169536 is an abundant number, since it is smaller than the sum of its proper divisors (114149184).

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

51169536 is a wasteful number, since it uses less digits than its factorization.

51169536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 689 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 51169536 is about 7153.2884745409. The cubic root of 51169536 is about 371.2534455348.

The spelling of 51169536 in words is "fifty-one million, one hundred sixty-nine thousand, five hundred thirty-six".