51376551 has 16 divisors (see below), whose sum is σ = 73334400. Its totient is φ = 31896288.

The previous prime is 51376547. The next prime is 51376561. The reversal of 51376551 is 15567315.

It is not a de Polignac number, because 51376551 - 2² = 51376547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51376531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4276 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (4583400).

Almost surely, 2^51376551 is an apocalyptic number.

51376551 is a deficient number, since it is larger than the sum of its proper divisors (21957849).

51376551 is a wasteful number, since it uses less digits than its factorization.

51376551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15358.

The product of its digits is 15750, while the sum is 33.

The square root of 51376551 is about 7167.7437872736. The cubic root of 51376551 is about 371.7534280570.

The spelling of 51376551 in words is "fifty-one million, three hundred seventy-six thousand, five hundred fifty-one".