818056231 has 4 divisors (see below), whose sum is σ = 838008864. Its totient is φ = 798103600.

The previous prime is 818056207. The next prime is 818056259. The reversal of 818056231 is 132650818.

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 818056231 - 2¹¹ = 818054183 is a prime.

It is a super-2 number, since 2×818056231² = 1338431994155850722, 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 (818056271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9976255 + ... + 9976336.

It is an arithmetic number, because the mean of its divisors is an integer number (209502216).

Almost surely, 2^818056231 is an apocalyptic number.

818056231 is a deficient number, since it is larger than the sum of its proper divisors (19952633).

818056231 is a wasteful number, since it uses less digits than its factorization.

818056231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19952632.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 818056231 is about 28601.6823106614. The cubic root of 818056231 is about 935.2500045433.

The spelling of 818056231 in words is "eight hundred eighteen million, fifty-six thousand, two hundred thirty-one".