51695953 has 4 divisors (see below), whose sum is σ = 51981748. Its totient is φ = 51410160.

The previous prime is 51695887. The next prime is 51695971. The reversal of 51695953 is 35959615.

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 1399489 + 50296464 = 1183^2 + 7092^2 .

It is a cyclic number.

It is not a de Polignac number, because 51695953 - 2¹³ = 51687761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51695983) 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, 142626 + ... + 142987.

It is an arithmetic number, because the mean of its divisors is an integer number (12995437).

Almost surely, 2^51695953 is an apocalyptic number.

It is an amenable number.

51695953 is a deficient number, since it is larger than the sum of its proper divisors (285795).

51695953 is a wasteful number, since it uses less digits than its factorization.

51695953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285794.

The product of its digits is 182250, while the sum is 43.

The square root of 51695953 is about 7189.9897774614. The cubic root of 51695953 is about 372.5222195956.

It can be divided in two parts, 516 and 95953, that added together give a palindrome (96469).

The spelling of 51695953 in words is "fifty-one million, six hundred ninety-five thousand, nine hundred fifty-three".