15312310231 has 4 divisors (see below), whose sum is σ = 15335476264. Its totient is φ = 15289144200.

The previous prime is 15312310187. The next prime is 15312310253. The reversal of 15312310231 is 13201321351.

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 15312310231 - 2¹³ = 15312302039 is a prime.

It is a super-2 number, since 2×15312310231² (a number of 21 digits) 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 (15312310331) 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, 11582025 + ... + 11583346.

It is an arithmetic number, because the mean of its divisors is an integer number (3833869066).

Almost surely, 2^15312310231 is an apocalyptic number.

15312310231 is a deficient number, since it is larger than the sum of its proper divisors (23166033).

15312310231 is an equidigital number, since it uses as much as digits as its factorization.

15312310231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23166032.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 15312310231 its reverse (13201321351), we get a palindrome (28513631582).

The spelling of 15312310231 in words is "fifteen billion, three hundred twelve million, three hundred ten thousand, two hundred thirty-one".