51623157 has 8 divisors (see below), whose sum is σ = 68868576. Its totient is φ = 34396592.

The previous prime is 51623149. The next prime is 51623179. The reversal of 51623157 is 75132615.

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 51623157 - 2³ = 51623149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51623137) 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, 3958 + ... + 10904.

It is an arithmetic number, because the mean of its divisors is an integer number (8608572).

Almost surely, 2^51623157 is an apocalyptic number.

It is an amenable number.

51623157 is a deficient number, since it is larger than the sum of its proper divisors (17245419).

51623157 is a wasteful number, since it uses less digits than its factorization.

51623157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9427.

The product of its digits is 6300, while the sum is 30.

The square root of 51623157 is about 7184.9256781125. The cubic root of 51623157 is about 372.3472809092.

The spelling of 51623157 in words is "fifty-one million, six hundred twenty-three thousand, one hundred fifty-seven".