31545023 has 2 divisors, whose sum is σ = 31545024. Its totient is φ = 31545022.

The previous prime is 31545001. The next prime is 31545049. The reversal of 31545023 is 32054513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31545023 - 2²⁰ = 30496447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31545023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31545083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15772511 + 15772512.

It is an arithmetic number, because the mean of its divisors is an integer number (15772512).

Almost surely, 2^31545023 is an apocalyptic number.

31545023 is a deficient number, since it is larger than the sum of its proper divisors (1).

31545023 is an equidigital number, since it uses as much as digits as its factorization.

31545023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 31545023 is about 5616.4956155952. The cubic root of 31545023 is about 315.9683746324.

Adding to 31545023 its reverse (32054513), we get a palindrome (63599536).

The spelling of 31545023 in words is "thirty-one million, five hundred forty-five thousand, twenty-three".