51170493 has 32 divisors (see below), whose sum is σ = 80341632. Its totient is φ = 28620800.

The previous prime is 51170489. The next prime is 51170533. The reversal of 51170493 is 39407115.

It is a cyclic number.

It is not a de Polignac number, because 51170493 - 2² = 51170489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51170493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51170293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28873 + ... + 30593.

It is an arithmetic number, because the mean of its divisors is an integer number (2510676).

Almost surely, 2^51170493 is an apocalyptic number.

51170493 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51170493 is a deficient number, since it is larger than the sum of its proper divisors (29171139).

51170493 is a wasteful number, since it uses less digits than its factorization.

51170493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 51170493 is about 7153.3553665395. The cubic root of 51170493 is about 371.2557599805.

The spelling of 51170493 in words is "fifty-one million, one hundred seventy thousand, four hundred ninety-three".