231002131 has 8 divisors (see below), whose sum is σ = 234920144. Its totient is φ = 227098080.

The previous prime is 231002113. The next prime is 231002153. The reversal of 231002131 is 131200132.

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 231002131 - 2²¹ = 228904979 is a prime.

It is a super-2 number, since 2×231002131² = 106723969053082322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231006131) 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, 33061 + ... + 39433.

It is an arithmetic number, because the mean of its divisors is an integer number (29365018).

Almost surely, 2^231002131 is an apocalyptic number.

231002131 is a deficient number, since it is larger than the sum of its proper divisors (3918013).

231002131 is an equidigital number, since it uses as much as digits as its factorization.

231002131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 231002131 is about 15198.7542581621. The cubic root of 231002131 is about 613.5811307387.

Adding to 231002131 its reverse (131200132), we get a palindrome (362202263).

The spelling of 231002131 in words is "two hundred thirty-one million, two thousand, one hundred thirty-one".