51763621 has 8 divisors (see below), whose sum is σ = 63709184. Its totient is φ = 40955760.

The previous prime is 51763609. The next prime is 51763631. The reversal of 51763621 is 12636715.

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 51763621 - 2¹⁵ = 51730853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51763631) 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, 284325 + ... + 284506.

It is an arithmetic number, because the mean of its divisors is an integer number (7963648).

Almost surely, 2^51763621 is an apocalyptic number.

It is an amenable number.

51763621 is a deficient number, since it is larger than the sum of its proper divisors (11945563).

51763621 is a wasteful number, since it uses less digits than its factorization.

51763621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568851.

The product of its digits is 7560, while the sum is 31.

The square root of 51763621 is about 7194.6939476256. The cubic root of 51763621 is about 372.6846877798.

The spelling of 51763621 in words is "fifty-one million, seven hundred sixty-three thousand, six hundred twenty-one".