816158231 has 8 divisors (see below), whose sum is σ = 933258144. Its totient is φ = 699184800.

The previous prime is 816158221. The next prime is 816158249. The reversal of 816158231 is 132851618.

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 816158231 - 2¹⁴ = 816141847 is a prime.

It is a super-2 number, since 2×816158231² = 1332228516058098722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816158191 and 816158200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816158201) 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, 17360 + ... + 43973.

It is an arithmetic number, because the mean of its divisors is an integer number (116657268).

Almost surely, 2^816158231 is an apocalyptic number.

816158231 is a deficient number, since it is larger than the sum of its proper divisors (117099913).

816158231 is a wasteful number, since it uses less digits than its factorization.

816158231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63241.

The product of its digits is 11520, while the sum is 35.

The square root of 816158231 is about 28568.4831763956. The cubic root of 816158231 is about 934.5261426862.

The spelling of 816158231 in words is "eight hundred sixteen million, one hundred fifty-eight thousand, two hundred thirty-one".