51492621 has 8 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 34286912.

The previous prime is 51492611. The next prime is 51492647. The reversal of 51492621 is 12629415.

51492621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51492621 - 2⁶ = 51492557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51492611) 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 7 ways as a sum of consecutive naturals, for example, 7356 + ... + 12533.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^51492621 is an apocalyptic number.

It is an amenable number.

51492621 is a deficient number, since it is larger than the sum of its proper divisors (17247219).

51492621 is a wasteful number, since it uses less digits than its factorization.

51492621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20755.

The product of its digits is 4320, while the sum is 30.

The square root of 51492621 is about 7175.8359094951. The cubic root of 51492621 is about 372.0331728424.

The spelling of 51492621 in words is "fifty-one million, four hundred ninety-two thousand, six hundred twenty-one".