230811831 has 24 divisors (see below), whose sum is σ = 355994496. Its totient is φ = 143755920.

The previous prime is 230811817. The next prime is 230811859. The reversal of 230811831 is 138118032.

It is not a de Polignac number, because 230811831 - 2¹⁰ = 230810807 is a prime.

It is a super-2 number, since 2×230811831² = 106548202659145122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230811795 and 230811804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230811811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4065 + ... + 21866.

It is an arithmetic number, because the mean of its divisors is an integer number (14833104).

Almost surely, 2^230811831 is an apocalyptic number.

230811831 is a deficient number, since it is larger than the sum of its proper divisors (125182665).

230811831 is a wasteful number, since it uses less digits than its factorization.

230811831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26003 (or 26000 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 230811831 is about 15192.4925868009. The cubic root of 230811831 is about 613.4125946781.

Adding to 230811831 its reverse (138118032), we get a palindrome (368929863).

The spelling of 230811831 in words is "two hundred thirty million, eight hundred eleven thousand, eight hundred thirty-one".