51429917 has 8 divisors (see below), whose sum is σ = 64120512. Its totient is φ = 40075200.

The previous prime is 51429901. The next prime is 51429919. The reversal of 51429917 is 71992415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51429917 - 2⁴ = 51429901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51429919) 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, 333884 + ... + 334037.

It is an arithmetic number, because the mean of its divisors is an integer number (8015064).

Almost surely, 2^51429917 is an apocalyptic number.

It is an amenable number.

51429917 is a deficient number, since it is larger than the sum of its proper divisors (12690595).

51429917 is a wasteful number, since it uses less digits than its factorization.

51429917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667939.

The product of its digits is 22680, while the sum is 38.

The square root of 51429917 is about 7171.4654708783. The cubic root of 51429917 is about 371.8820997821.

The spelling of 51429917 in words is "fifty-one million, four hundred twenty-nine thousand, nine hundred seventeen".