51656653 has 2 divisors, whose sum is σ = 51656654. Its totient is φ = 51656652.

The previous prime is 51656651. The next prime is 51656669. The reversal of 51656653 is 35665615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43917129 + 7739524 = 6627^2 + 2782^2 .

It is a cyclic number.

It is not a de Polignac number, because 51656653 - 2¹ = 51656651 is a prime.

Together with 51656651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51656651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25828326 + 25828327.

It is an arithmetic number, because the mean of its divisors is an integer number (25828327).

Almost surely, 2^51656653 is an apocalyptic number.

It is an amenable number.

51656653 is a deficient number, since it is larger than the sum of its proper divisors (1).

51656653 is an equidigital number, since it uses as much as digits as its factorization.

51656653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 37.

The square root of 51656653 is about 7187.2562915204. The cubic root of 51656653 is about 372.4277967647.

The spelling of 51656653 in words is "fifty-one million, six hundred fifty-six thousand, six hundred fifty-three".