51066120 has 64 divisors (see below), whose sum is σ = 175086720. Its totient is φ = 11672064.

The previous prime is 51066109. The next prime is 51066121. The reversal of 51066120 is 2166015.

It is a happy number.

It is a super-2 number, since 2×51066120² = 5215497223708800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (51066121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29557 + ... + 31236.

It is an arithmetic number, because the mean of its divisors is an integer number (2735730).

Almost surely, 2^51066120 is an apocalyptic number.

It is an amenable number.

51066120 is an abundant number, since it is smaller than the sum of its proper divisors (124020600).

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

51066120 is a wasteful number, since it uses less digits than its factorization.

51066120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60814 (or 60810 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 51066120 is about 7146.0562550263. The cubic root of 51066120 is about 371.0031700555.

The spelling of 51066120 in words is "fifty-one million, sixty-six thousand, one hundred twenty".