51300045 has 24 divisors (see below), whose sum is σ = 89926200. Its totient is φ = 27050496.

The previous prime is 51300031. The next prime is 51300047. The reversal of 51300045 is 54000315.

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 51108201 = 438^2 + 7149^2 .

It is not a de Polignac number, because 51300045 - 2⁷ = 51299917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51300047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2400 + ... + 10409.

It is an arithmetic number, because the mean of its divisors is an integer number (3746925).

Almost surely, 2^51300045 is an apocalyptic number.

It is an amenable number.

51300045 is a deficient number, since it is larger than the sum of its proper divisors (38626155).

51300045 is a wasteful number, since it uses less digits than its factorization.

51300045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12909 (or 12906 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 51300045 is about 7162.4049731916. The cubic root of 51300045 is about 371.5688075348.

The spelling of 51300045 in words is "fifty-one million, three hundred thousand, forty-five".