51910093 has 4 divisors (see below), whose sum is σ = 51979068. Its totient is φ = 51841120.

The previous prime is 51910069. The next prime is 51910097. The reversal of 51910093 is 39001915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39001915 = 5 ⋅7800383.

It can be written as a sum of positive squares in 2 ways, for example, as 5846724 + 46063369 = 2418^2 + 6787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51910093 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 (51910097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33346 + ... + 34867.

It is an arithmetic number, because the mean of its divisors is an integer number (12994767).

Almost surely, 2^51910093 is an apocalyptic number.

It is an amenable number.

51910093 is a deficient number, since it is larger than the sum of its proper divisors (68975).

51910093 is an equidigital number, since it uses as much as digits as its factorization.

51910093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68974.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 51910093 is about 7204.8659251925. The cubic root of 51910093 is about 373.0358769191.

The spelling of 51910093 in words is "fifty-one million, nine hundred ten thousand, ninety-three".