51161136 has 80 divisors (see below), whose sum is σ = 143490816. Its totient is φ = 15614208.

The previous prime is 51161107. The next prime is 51161141. The reversal of 51161136 is 63116115.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 101461 + ... + 101963.

Almost surely, 2^51161136 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 51161136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71745408).

51161136 is an abundant number, since it is smaller than the sum of its proper divisors (92329680).

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

51161136 is a wasteful number, since it uses less digits than its factorization.

51161136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 684 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 51161136 is about 7152.7013078976. The cubic root of 51161136 is about 371.2331294128.

The spelling of 51161136 in words is "fifty-one million, one hundred sixty-one thousand, one hundred thirty-six".