31012400023 has 4 divisors (see below), whose sum is σ = 33831709128. Its totient is φ = 28193090920.

The previous prime is 31012400021. The next prime is 31012400033. The reversal of 31012400023 is 32000421013.

It is a happy number.

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 31012400023 - 2¹ = 31012400021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012400021) 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, 1409654536 + ... + 1409654557.

It is an arithmetic number, because the mean of its divisors is an integer number (8457927282).

Almost surely, 2^31012400023 is an apocalyptic number.

31012400023 is a deficient number, since it is larger than the sum of its proper divisors (2819309105).

31012400023 is a wasteful number, since it uses less digits than its factorization.

31012400023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819309104.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31012400023 its reverse (32000421013), we get a palindrome (63012821036).

The spelling of 31012400023 in words is "thirty-one billion, twelve million, four hundred thousand, twenty-three".