51123507 has 16 divisors (see below), whose sum is σ = 69696000. Its totient is φ = 33325344.

The previous prime is 51123497. The next prime is 51123511. The reversal of 51123507 is 70532115.

It is not a de Polignac number, because 51123507 - 2⁷ = 51123379 is a prime.

It is a super-2 number, since 2×51123507² = 5227225935958098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51123407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24844 + ... + 26822.

It is an arithmetic number, because the mean of its divisors is an integer number (4356000).

Almost surely, 2^51123507 is an apocalyptic number.

51123507 is a deficient number, since it is larger than the sum of its proper divisors (18572493).

51123507 is a wasteful number, since it uses less digits than its factorization.

51123507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 51123507 is about 7150.0704192336. The cubic root of 51123507 is about 371.1420931388.

The spelling of 51123507 in words is "fifty-one million, one hundred twenty-three thousand, five hundred seven".