1310123231 has 4 divisors (see below), whose sum is σ = 1311082992. Its totient is φ = 1309163472.

The previous prime is 1310123219. The next prime is 1310123239. The reversal of 1310123231 is 1323210131.

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

It is a cyclic number.

It is not a de Polignac number, because 1310123231 - 2²² = 1305928927 is a prime.

It is a super-2 number, since 2×1310123231² = 3432845760811758722, 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 (1310123239) 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, 477830 + ... + 480563.

It is an arithmetic number, because the mean of its divisors is an integer number (327770748).

Almost surely, 2^1310123231 is an apocalyptic number.

1310123231 is a deficient number, since it is larger than the sum of its proper divisors (959761).

1310123231 is an equidigital number, since it uses as much as digits as its factorization.

1310123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959760.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1310123231 is about 36195.6244731321. The cubic root of 1310123231 is about 1094.2184900615.

Adding to 1310123231 its reverse (1323210131), we get a palindrome (2633333362).

The spelling of 1310123231 in words is "one billion, three hundred ten million, one hundred twenty-three thousand, two hundred thirty-one".