231401233 has 8 divisors (see below), whose sum is σ = 269448768. Its totient is φ = 194601264.

The previous prime is 231401231. The next prime is 231401249. The reversal of 231401233 is 332104132.

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 231401233 - 2¹ = 231401231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231401233.

It is not an unprimeable number, because it can be changed into a prime (231401231) 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, 311491 + ... + 312232.

It is an arithmetic number, because the mean of its divisors is an integer number (33681096).

Almost surely, 2^231401233 is an apocalyptic number.

It is an amenable number.

231401233 is a deficient number, since it is larger than the sum of its proper divisors (38047535).

231401233 is an equidigital number, since it uses as much as digits as its factorization.

231401233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623783.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 231401233 is about 15211.8780234394. The cubic root of 231401233 is about 613.9342884686.

Adding to 231401233 its reverse (332104132), we get a palindrome (563505365).

The spelling of 231401233 in words is "two hundred thirty-one million, four hundred one thousand, two hundred thirty-three".