2551656733 has 2 divisors, whose sum is σ = 2551656734. Its totient is φ = 2551656732.

The previous prime is 2551656697. The next prime is 2551656763. The reversal of 2551656733 is 3376561552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2409140889 + 142515844 = 49083^2 + 11938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551656733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2551656733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551656763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275828366 + 1275828367.

It is an arithmetic number, because the mean of its divisors is an integer number (1275828367).

Almost surely, 2^2551656733 is an apocalyptic number.

It is an amenable number.

2551656733 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551656733 is an equidigital number, since it uses as much as digits as its factorization.

2551656733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567000, while the sum is 43.

The square root of 2551656733 is about 50513.9261293359. The cubic root of 2551656733 is about 1366.4930164125.

The spelling of 2551656733 in words is "two billion, five hundred fifty-one million, six hundred fifty-six thousand, seven hundred thirty-three".