51116164 has 24 divisors (see below), whose sum is σ = 99858528. Its totient is φ = 22693440.

The previous prime is 51116159. The next prime is 51116167. The reversal of 51116164 is 46161115.

It is a super-2 number, since 2×51116164² = 5225724444149792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51116167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11617 + ... + 15400.

It is an arithmetic number, because the mean of its divisors is an integer number (4160772).

Almost surely, 2^51116164 is an apocalyptic number.

It is an amenable number.

51116164 is a deficient number, since it is larger than the sum of its proper divisors (48742364).

51116164 is a wasteful number, since it uses less digits than its factorization.

51116164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27075 (or 27073 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 51116164 is about 7149.5569093476. The cubic root of 51116164 is about 371.1243229254.

Adding to 51116164 its reverse (46161115), we get a palindrome (97277279).

It can be divided in two parts, 511161 and 64, that added together give a square (511225 = 715²).

The spelling of 51116164 in words is "fifty-one million, one hundred sixteen thousand, one hundred sixty-four".