815072255 has 8 divisors (see below), whose sum is σ = 978262272. Its totient is φ = 651940768.

The previous prime is 815072239. The next prime is 815072257. The reversal of 815072255 is 552270518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 815072255 - 2⁴ = 815072239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815072257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26549 + ... + 48321.

It is an arithmetic number, because the mean of its divisors is an integer number (122282784).

Almost surely, 2^815072255 is an apocalyptic number.

815072255 is a deficient number, since it is larger than the sum of its proper divisors (163190017).

815072255 is a wasteful number, since it uses less digits than its factorization.

815072255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29265.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 815072255 is about 28549.4703103227. The cubic root of 815072255 is about 934.1114667957. Note that the first 3 decimals are identical.

The spelling of 815072255 in words is "eight hundred fifteen million, seventy-two thousand, two hundred fifty-five".