51004945 has 8 divisors (see below), whose sum is σ = 61246080. Its totient is φ = 40777200.

The previous prime is 51004937. The next prime is 51004979. The reversal of 51004945 is 54940015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51004945 - 2³ = 51004937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9586 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (7655760).

Almost surely, 2^51004945 is an apocalyptic number.

It is an amenable number.

51004945 is a deficient number, since it is larger than the sum of its proper divisors (10241135).

51004945 is a wasteful number, since it uses less digits than its factorization.

51004945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6695.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51004945 is about 7141.7746394016. The cubic root of 51004945 is about 370.8549622812.

The spelling of 51004945 in words is "fifty-one million, four thousand, nine hundred forty-five".