51163009 has 4 divisors (see below), whose sum is σ = 51926704. Its totient is φ = 50399316.

The previous prime is 51162997. The next prime is 51163027. The reversal of 51163009 is 90036115.

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.

It is a cyclic number.

It is not a de Polignac number, because 51163009 - 2⁵ = 51162977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51163309) 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, 381747 + ... + 381880.

It is an arithmetic number, because the mean of its divisors is an integer number (12981676).

Almost surely, 2^51163009 is an apocalyptic number.

It is an amenable number.

51163009 is a deficient number, since it is larger than the sum of its proper divisors (763695).

51163009 is an equidigital number, since it uses as much as digits as its factorization.

51163009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763694.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 51163009 is about 7152.8322362544. The cubic root of 51163009 is about 371.2376596169.

The spelling of 51163009 in words is "fifty-one million, one hundred sixty-three thousand, nine".