51123506 has 16 divisors (see below), whose sum is σ = 88842624. Its totient is φ = 21609504.

The previous prime is 51123497. The next prime is 51123511. The reversal of 51123506 is 60532115.

It is a super-2 number, since 2×51123506² = 5227225731464072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23990 + ... + 26033.

It is an arithmetic number, because the mean of its divisors is an integer number (5552664).

Almost surely, 2^51123506 is an apocalyptic number.

51123506 is a deficient number, since it is larger than the sum of its proper divisors (37719118).

51123506 is a wasteful number, since it uses less digits than its factorization.

51123506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50105.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51123506 is about 7150.0703493043. The cubic root of 51123506 is about 371.1420907189.

The spelling of 51123506 in words is "fifty-one million, one hundred twenty-three thousand, five hundred six".