51376251 has 4 divisors (see below), whose sum is σ = 68501672. Its totient is φ = 34250832.

The previous prime is 51376249. The next prime is 51376277. The reversal of 51376251 is 15267315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51376251 - 2¹ = 51376249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51376211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8562706 + ... + 8562711.

It is an arithmetic number, because the mean of its divisors is an integer number (17125418).

Almost surely, 2^51376251 is an apocalyptic number.

51376251 is a deficient number, since it is larger than the sum of its proper divisors (17125421).

51376251 is a wasteful number, since it uses less digits than its factorization.

51376251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17125420.

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

The square root of 51376251 is about 7167.7228601558. The cubic root of 51376251 is about 371.7527044698.

The spelling of 51376251 in words is "fifty-one million, three hundred seventy-six thousand, two hundred fifty-one".