51624157 has 8 divisors (see below), whose sum is σ = 55841240. Its totient is φ = 47442240.

The previous prime is 51624149. The next prime is 51624169. The reversal of 51624157 is 75142615.

It can be written as a sum of positive squares in 4 ways, for example, as 20921476 + 30702681 = 4574^2 + 5541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51624157 - 2³ = 51624149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51624107) 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, 5694 + ... + 11647.

It is an arithmetic number, because the mean of its divisors is an integer number (6980155).

Almost surely, 2^51624157 is an apocalyptic number.

It is an amenable number.

51624157 is a deficient number, since it is larger than the sum of its proper divisors (4217083).

51624157 is a wasteful number, since it uses less digits than its factorization.

51624157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17583.

The product of its digits is 8400, while the sum is 31.

The square root of 51624157 is about 7184.9952679177. The cubic root of 51624157 is about 372.3496851589.

The spelling of 51624157 in words is "fifty-one million, six hundred twenty-four thousand, one hundred fifty-seven".