31542023 has 2 divisors, whose sum is σ = 31542024. Its totient is φ = 31542022.

The previous prime is 31542013. The next prime is 31542031. The reversal of 31542023 is 32024513.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31542023 - 2²⁴ = 14764807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31541986 and 31542004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31542013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771011 + 15771012.

It is an arithmetic number, because the mean of its divisors is an integer number (15771012).

Almost surely, 2^31542023 is an apocalyptic number.

31542023 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542023 is an equidigital number, since it uses as much as digits as its factorization.

31542023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31542023 is about 5616.2285387972. The cubic root of 31542023 is about 315.9583578893.

Adding to 31542023 its reverse (32024513), we get a palindrome (63566536).

The spelling of 31542023 in words is "thirty-one million, five hundred forty-two thousand, twenty-three".