51576913 has 4 divisors (see below), whose sum is σ = 51636208. Its totient is φ = 51517620.

The previous prime is 51576911. The next prime is 51576953. The reversal of 51576913 is 31967515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31967515 = 5 ⋅6393503.

It is a cyclic number.

It is not a de Polignac number, because 51576913 - 2¹ = 51576911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51576911) 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, 28323 + ... + 30088.

It is an arithmetic number, because the mean of its divisors is an integer number (12909052).

Almost surely, 2^51576913 is an apocalyptic number.

It is an amenable number.

51576913 is a deficient number, since it is larger than the sum of its proper divisors (59295).

51576913 is an equidigital number, since it uses as much as digits as its factorization.

51576913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59294.

The product of its digits is 28350, while the sum is 37.

The square root of 51576913 is about 7181.7068305522. The cubic root of 51576913 is about 372.2360648532.

The spelling of 51576913 in words is "fifty-one million, five hundred seventy-six thousand, nine hundred thirteen".