231551233 has 4 divisors (see below), whose sum is σ = 243738160. Its totient is φ = 219364308.

The previous prime is 231551219. The next prime is 231551251. The reversal of 231551233 is 332155132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231551233 - 2¹³ = 231543041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231551198 and 231551207.

It is not an unprimeable number, because it can be changed into a prime (231551213) 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, 6093435 + ... + 6093472.

It is an arithmetic number, because the mean of its divisors is an integer number (60934540).

Almost surely, 2^231551233 is an apocalyptic number.

It is an amenable number.

231551233 is a deficient number, since it is larger than the sum of its proper divisors (12186927).

231551233 is a wasteful number, since it uses less digits than its factorization.

231551233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12186926.

The product of its digits is 2700, while the sum is 25.

The square root of 231551233 is about 15216.8075824070. The cubic root of 231551233 is about 614.0669156099.

The spelling of 231551233 in words is "two hundred thirty-one million, five hundred fifty-one thousand, two hundred thirty-three".