31224243239 has 16 divisors (see below), whose sum is σ = 37243058688. Its totient is φ = 25595398752.

The previous prime is 31224243233. The next prime is 31224243257. The reversal of 31224243239 is 93234242213.

It is not a de Polignac number, because 31224243239 - 2¹² = 31224239143 is a prime.

It is a super-2 number, since 2×31224243239² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31224243199 and 31224243208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224243233) 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, 1104509 + ... + 1132425.

It is an arithmetic number, because the mean of its divisors is an integer number (2327691168).

Almost surely, 2^31224243239 is an apocalyptic number.

31224243239 is a deficient number, since it is larger than the sum of its proper divisors (6018815449).

31224243239 is a wasteful number, since it uses less digits than its factorization.

31224243239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34894.

The product of its digits is 62208, while the sum is 35.

The spelling of 31224243239 in words is "thirty-one billion, two hundred twenty-four million, two hundred forty-three thousand, two hundred thirty-nine".