51123087 has 24 divisors (see below), whose sum is σ = 76876800. Its totient is φ = 32710608.

The previous prime is 51123073. The next prime is 51123109. The reversal of 51123087 is 78032115.

It is not a de Polignac number, because 51123087 - 2⁷ = 51122959 is a prime.

It is a super-2 number, since 2×51123087² = 5227140048819138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51123087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21714 + ... + 23952.

It is an arithmetic number, because the mean of its divisors is an integer number (3203200).

Almost surely, 2^51123087 is an apocalyptic number.

51123087 is a deficient number, since it is larger than the sum of its proper divisors (25753713).

51123087 is a wasteful number, since it uses less digits than its factorization.

51123087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 51123087 is about 7150.0410488332. The cubic root of 51123087 is about 371.1410767759.

The spelling of 51123087 in words is "fifty-one million, one hundred twenty-three thousand, eighty-seven".