51455251 has 8 divisors (see below), whose sum is σ = 53449200. Its totient is φ = 49476000.

The previous prime is 51455237. The next prime is 51455267. The reversal of 51455251 is 15255415.

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 51455251 - 2²⁵ = 17900819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51455221) 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, 3745 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (6681150).

Almost surely, 2^51455251 is an apocalyptic number.

51455251 is a deficient number, since it is larger than the sum of its proper divisors (1993949).

51455251 is a wasteful number, since it uses less digits than its factorization.

51455251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7349.

The product of its digits is 5000, while the sum is 28.

The square root of 51455251 is about 7173.2315590674. The cubic root of 51455251 is about 371.9431518904.

The spelling of 51455251 in words is "fifty-one million, four hundred fifty-five thousand, two hundred fifty-one".