815002231 has 4 divisors (see below), whose sum is σ = 832342752. Its totient is φ = 797661712.

The previous prime is 815002213. The next prime is 815002241. The reversal of 815002231 is 132200518.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 815002231 - 2¹³ = 814994039 is a prime.

It is a super-2 number, since 2×815002231² = 1328457273069954722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815002241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8670190 + ... + 8670283.

It is an arithmetic number, because the mean of its divisors is an integer number (208085688).

Almost surely, 2^815002231 is an apocalyptic number.

815002231 is a deficient number, since it is larger than the sum of its proper divisors (17340521).

815002231 is a wasteful number, since it uses less digits than its factorization.

815002231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17340520.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 815002231 is about 28548.2439214744. The cubic root of 815002231 is about 934.0847157545.

Adding to 815002231 its reverse (132200518), we get a palindrome (947202749).

The spelling of 815002231 in words is "eight hundred fifteen million, two thousand, two hundred thirty-one".