31540232323 has 4 divisors (see below), whose sum is σ = 31541007168. Its totient is φ = 31539457480.

The previous prime is 31540232309. The next prime is 31540232359. The reversal of 31540232323 is 32323204513.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31540232323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31540232291 and 31540232300.

It is not an unprimeable number, because it can be changed into a prime (31540232363) 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, 322768 + ... + 408973.

It is an arithmetic number, because the mean of its divisors is an integer number (7885251792).

Almost surely, 2^31540232323 is an apocalyptic number.

31540232323 is a deficient number, since it is larger than the sum of its proper divisors (774845).

31540232323 is an equidigital number, since it uses as much as digits as its factorization.

31540232323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774844.

The product of its (nonzero) digits is 12960, while the sum is 28.

Adding to 31540232323 its reverse (32323204513), we get a palindrome (63863436836).

The spelling of 31540232323 in words is "thirty-one billion, five hundred forty million, two hundred thirty-two thousand, three hundred twenty-three".