51279651 has 12 divisors (see below), whose sum is σ = 77969320. Its totient is φ = 32387040.

The previous prime is 51279649. The next prime is 51279659. The reversal of 51279651 is 15697215.

51279651 is a `hidden beast` number, since 512 + 7 + 96 + 51 = 666.

It is not a de Polignac number, because 51279651 - 2¹ = 51279649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51279659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149770 + ... + 150111.

Almost surely, 2^51279651 is an apocalyptic number.

51279651 is a deficient number, since it is larger than the sum of its proper divisors (26689669).

51279651 is a wasteful number, since it uses less digits than its factorization.

51279651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299906 (or 299903 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 51279651 is about 7160.9811478596. The cubic root of 51279651 is about 371.5195627525.

The spelling of 51279651 in words is "fifty-one million, two hundred seventy-nine thousand, six hundred fifty-one".