231002231 has 4 divisors (see below), whose sum is σ = 231050952. Its totient is φ = 230953512.

The previous prime is 231002221. The next prime is 231002267. The reversal of 231002231 is 132200132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231002231 is a prime.

It is a super-2 number, since 2×231002231² = 106724061453954722, 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 (231002201) 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, 16376 + ... + 27021.

It is an arithmetic number, because the mean of its divisors is an integer number (57762738).

Almost surely, 2^231002231 is an apocalyptic number.

231002231 is a deficient number, since it is larger than the sum of its proper divisors (48721).

231002231 is an equidigital number, since it uses as much as digits as its factorization.

231002231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48720.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231002231 is about 15198.7575479050. The cubic root of 231002231 is about 613.5812192777.

Adding to 231002231 its reverse (132200132), we get a palindrome (363202363).

The spelling of 231002231 in words is "two hundred thirty-one million, two thousand, two hundred thirty-one".