51912241 has 4 divisors (see below), whose sum is σ = 52062192. Its totient is φ = 51762292.

The previous prime is 51912209. The next prime is 51912251. The reversal of 51912241 is 14221915.

It is a happy number.

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 51912241 - 2⁵ = 51912209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51912251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74455 + ... + 75148.

It is an arithmetic number, because the mean of its divisors is an integer number (13015548).

Almost surely, 2^51912241 is an apocalyptic number.

It is an amenable number.

51912241 is a deficient number, since it is larger than the sum of its proper divisors (149951).

51912241 is a wasteful number, since it uses less digits than its factorization.

51912241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149950.

The product of its digits is 720, while the sum is 25.

The square root of 51912241 is about 7205.0149895750. The cubic root of 51912241 is about 373.0410221613.

The spelling of 51912241 in words is "fifty-one million, nine hundred twelve thousand, two hundred forty-one".