1231313023 has 4 divisors (see below), whose sum is σ = 1231574400. Its totient is φ = 1231051648.

The previous prime is 1231312997. The next prime is 1231313029. The reversal of 1231313023 is 3203131321.

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 1231313023 - 2⁵ = 1231312991 is a prime.

It is a super-2 number, since 2×1231313023² = 3032263521218797058, 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 (1231313029) 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, 123490 + ... + 133087.

It is an arithmetic number, because the mean of its divisors is an integer number (307893600).

Almost surely, 2^1231313023 is an apocalyptic number.

1231313023 is a deficient number, since it is larger than the sum of its proper divisors (261377).

1231313023 is an equidigital number, since it uses as much as digits as its factorization.

1231313023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261376.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1231313023 is about 35090.0701481203. The cubic root of 1231313023 is about 1071.8223880463.

Adding to 1231313023 its reverse (3203131321), we get a palindrome (4434444344).

The spelling of 1231313023 in words is "one billion, two hundred thirty-one million, three hundred thirteen thousand, twenty-three".