51161516 has 12 divisors (see below), whose sum is σ = 102323088. Its totient is φ = 21926352.

The previous prime is 51161503. The next prime is 51161527. The reversal of 51161516 is 61516115.

51161516 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913571 + ... + 913626.

It is an arithmetic number, because the mean of its divisors is an integer number (8526924).

Almost surely, 2^51161516 is an apocalyptic number.

It is an amenable number.

51161516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51161516 is a wasteful number, since it uses less digits than its factorization.

51161516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827208 (or 1827206 counting only the distinct ones).

The product of its digits is 900, while the sum is 26.

The square root of 51161516 is about 7152.7278712391. The cubic root of 51161516 is about 371.2340485235.

The spelling of 51161516 in words is "fifty-one million, one hundred sixty-one thousand, five hundred sixteen".