231002031 has 16 divisors (see below), whose sum is σ = 335696256. Its totient is φ = 140440416.

The previous prime is 231002027. The next prime is 231002071. The reversal of 231002031 is 130200132.

It is a happy number.

It is not a de Polignac number, because 231002031 - 2² = 231002027 is a prime.

It is a super-2 number, since 2×231002031² = 106723876652249922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231001998 and 231002016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231002071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32445 + ... + 38918.

It is an arithmetic number, because the mean of its divisors is an integer number (20981016).

Almost surely, 2^231002031 is an apocalyptic number.

231002031 is a deficient number, since it is larger than the sum of its proper divisors (104694225).

231002031 is a wasteful number, since it uses less digits than its factorization.

231002031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71462.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 231002031 is about 15198.7509684184. The cubic root of 231002031 is about 613.5810421997.

Adding to 231002031 its reverse (130200132), we get a palindrome (361202163).

The spelling of 231002031 in words is "two hundred thirty-one million, two thousand, thirty-one".