51434921 has 8 divisors (see below), whose sum is σ = 54530304. Its totient is φ = 48429360.

The previous prime is 51434909. The next prime is 51434941. The reversal of 51434921 is 12943415.

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 51434921 - 2¹⁸ = 51172777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51434941) 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, 21275 + ... + 23568.

It is an arithmetic number, because the mean of its divisors is an integer number (6816288).

Almost surely, 2^51434921 is an apocalyptic number.

It is an amenable number.

51434921 is a deficient number, since it is larger than the sum of its proper divisors (3095383).

51434921 is a wasteful number, since it uses less digits than its factorization.

51434921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44911.

The product of its digits is 4320, while the sum is 29.

The square root of 51434921 is about 7171.8143450594. The cubic root of 51434921 is about 371.8941604515.

The spelling of 51434921 in words is "fifty-one million, four hundred thirty-four thousand, nine hundred twenty-one".