51760921 has 8 divisors (see below), whose sum is σ = 54560000. Its totient is φ = 48969360.

The previous prime is 51760909. The next prime is 51760931. The reversal of 51760921 is 12906715.

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 51760921 - 2⁵ = 51760889 is a prime.

It is a super-3 number, since 3×51760921³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51760931) 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, 17455 + ... + 20203.

It is an arithmetic number, because the mean of its divisors is an integer number (6820000).

Almost surely, 2^51760921 is an apocalyptic number.

It is an amenable number.

51760921 is a deficient number, since it is larger than the sum of its proper divisors (2799079).

51760921 is a wasteful number, since it uses less digits than its factorization.

51760921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 51760921 is about 7194.5063068983. The cubic root of 51760921 is about 372.6782078999.

The spelling of 51760921 in words is "fifty-one million, seven hundred sixty thousand, nine hundred twenty-one".