51473965 has 4 divisors (see below), whose sum is σ = 61768764. Its totient is φ = 41179168.

The previous prime is 51473963. The next prime is 51473969. The reversal of 51473965 is 56937415.

51473965 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 can be written as a sum of positive squares in 2 ways, for example, as 37478884 + 13995081 = 6122^2 + 3741^2 .

It is a cyclic number.

It is not a de Polignac number, because 51473965 - 2¹ = 51473963 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51473963) 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, 5147392 + ... + 5147401.

It is an arithmetic number, because the mean of its divisors is an integer number (15442191).

Almost surely, 2^51473965 is an apocalyptic number.

It is an amenable number.

51473965 is a deficient number, since it is larger than the sum of its proper divisors (10294799).

51473965 is a wasteful number, since it uses less digits than its factorization.

51473965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10294798.

The product of its digits is 113400, while the sum is 40.

The square root of 51473965 is about 7174.5358734904. The cubic root of 51473965 is about 371.9882376710.

The spelling of 51473965 in words is "fifty-one million, four hundred seventy-three thousand, nine hundred sixty-five".