31340023 has 16 divisors (see below), whose sum is σ = 37610496. Its totient is φ = 25734240.

The previous prime is 31340009. The next prime is 31340051. The reversal of 31340023 is 32004313.

It is a cyclic number.

It is not a de Polignac number, because 31340023 - 2¹⁷ = 31208951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31339979 and 31340006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4390 + ... + 9052.

It is an arithmetic number, because the mean of its divisors is an integer number (2350656).

Almost surely, 2^31340023 is an apocalyptic number.

31340023 is a deficient number, since it is larger than the sum of its proper divisors (6270473).

31340023 is a wasteful number, since it uses less digits than its factorization.

31340023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 31340023 is about 5598.2160551376. The cubic root of 31340023 is about 315.2824308306.

Adding to 31340023 its reverse (32004313), we get a palindrome (63344336).

The spelling of 31340023 in words is "thirty-one million, three hundred forty thousand, twenty-three".