815225953 has 2 divisors, whose sum is σ = 815225954. Its totient is φ = 815225952.

The previous prime is 815225911. The next prime is 815225977. The reversal of 815225953 is 359522518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544195584 + 271030369 = 23328^2 + 16463^2 .

It is a cyclic number.

It is not a de Polignac number, because 815225953 - 2¹³ = 815217761 is a prime.

It is not a weakly prime, because it can be changed into another prime (815225903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407612976 + 407612977.

It is an arithmetic number, because the mean of its divisors is an integer number (407612977).

Almost surely, 2^815225953 is an apocalyptic number.

It is an amenable number.

815225953 is a deficient number, since it is larger than the sum of its proper divisors (1).

815225953 is an equidigital number, since it uses as much as digits as its factorization.

815225953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The square root of 815225953 is about 28552.1619671786. The cubic root of 815225953 is about 934.1701781717.

The spelling of 815225953 in words is "eight hundred fifteen million, two hundred twenty-five thousand, nine hundred fifty-three".