51076621 has 4 divisors (see below), whose sum is σ = 51124032. Its totient is φ = 51029212.

The previous prime is 51076603. The next prime is 51076633. The reversal of 51076621 is 12667015.

51076621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51076621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51076621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51076661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22051 + ... + 24256.

It is an arithmetic number, because the mean of its divisors is an integer number (12781008).

Almost surely, 2^51076621 is an apocalyptic number.

It is an amenable number.

51076621 is a deficient number, since it is larger than the sum of its proper divisors (47411).

51076621 is a wasteful number, since it uses less digits than its factorization.

51076621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47410.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 51076621 is about 7146.7909581854. The cubic root of 51076621 is about 371.0285987694.

The spelling of 51076621 in words is "fifty-one million, seventy-six thousand, six hundred twenty-one".