815072651 has 2 divisors, whose sum is σ = 815072652. Its totient is φ = 815072650.

The previous prime is 815072623. The next prime is 815072683. The reversal of 815072651 is 156270518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 815072651 - 2²⁶ = 747963787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (815072351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407536325 + 407536326.

It is an arithmetic number, because the mean of its divisors is an integer number (407536326).

Almost surely, 2^815072651 is an apocalyptic number.

815072651 is a deficient number, since it is larger than the sum of its proper divisors (1).

815072651 is an equidigital number, since it uses as much as digits as its factorization.

815072651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 815072651 is about 28549.4772456520. The cubic root of 815072651 is about 934.1116180740. Note that the first 3 decimals are identical.

The spelling of 815072651 in words is "eight hundred fifteen million, seventy-two thousand, six hundred fifty-one".