51642651 has 8 divisors (see below), whose sum is σ = 72907344. Its totient is φ = 32403200.

The previous prime is 51642629. The next prime is 51642671. The reversal of 51642651 is 15624615.

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 51642651 - 2⁹ = 51642139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51642601) 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, 506250 + ... + 506351.

It is an arithmetic number, because the mean of its divisors is an integer number (9113418).

Almost surely, 2^51642651 is an apocalyptic number.

51642651 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51642651 is a deficient number, since it is larger than the sum of its proper divisors (21264693).

51642651 is a wasteful number, since it uses less digits than its factorization.

51642651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012621.

The product of its digits is 7200, while the sum is 30.

The square root of 51642651 is about 7186.2821403004. The cubic root of 51642651 is about 372.3941437569.

The spelling of 51642651 in words is "fifty-one million, six hundred forty-two thousand, six hundred fifty-one".