31240344223 has 8 divisors (see below), whose sum is σ = 34362032976. Its totient is φ = 28400311720.

The previous prime is 31240344211. The next prime is 31240344227. The reversal of 31240344223 is 32244304213.

It is not a de Polignac number, because 31240344223 - 2³³ = 22650409631 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31240344191 and 31240344200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240344227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11734336 + ... + 11736997.

It is an arithmetic number, because the mean of its divisors is an integer number (4295254122).

Almost surely, 2^31240344223 is an apocalyptic number.

31240344223 is a deficient number, since it is larger than the sum of its proper divisors (3121688753).

31240344223 is an equidigital number, since it uses as much as digits as its factorization.

31240344223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23471366 (or 23471344 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31240344223 its reverse (32244304213), we get a palindrome (63484648436).

The spelling of 31240344223 in words is "thirty-one billion, two hundred forty million, three hundred forty-four thousand, two hundred twenty-three".