51970807 has 4 divisors (see below), whose sum is σ = 59395216. Its totient is φ = 44546400.

The previous prime is 51970783. The next prime is 51970811. The reversal of 51970807 is 70807915.

51970807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51970807 - 2¹¹ = 51968759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51970837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3712194 + ... + 3712207.

It is an arithmetic number, because the mean of its divisors is an integer number (14848804).

Almost surely, 2^51970807 is an apocalyptic number.

51970807 is a deficient number, since it is larger than the sum of its proper divisors (7424409).

51970807 is an equidigital number, since it uses as much as digits as its factorization.

51970807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424408.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 51970807 is about 7209.0780964004. The cubic root of 51970807 is about 373.1812544027.

The spelling of 51970807 in words is "fifty-one million, nine hundred seventy thousand, eight hundred seven".