31220013230424 has 40 divisors (see below), whose sum is σ = 87444944466660. Its totient is φ = 10406671076592.

The previous prime is 31220013230423. The next prime is 31220013230429. The reversal of 31220013230424 is 42403231002213.

31220013230424 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 0 + 0 + 1 + 3 + 230 + 424 = 666.

It is a super-2 number, since 2×31220013230424² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220013230423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24089515734 + ... + 24089517029.

Almost surely, 2^{31220013230424} is an apocalyptic number.

It is an amenable number.

31220013230424 is an abundant number, since it is smaller than the sum of its proper divisors (56224931236236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31220013230424 is a wasteful number, since it uses less digits than its factorization.

31220013230424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48179032781 (or 48179032768 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 31220013230424 its reverse (42403231002213), we get a palindrome (73623244232637).

The spelling of 31220013230424 in words is "thirty-one trillion, two hundred twenty billion, thirteen million, two hundred thirty thousand, four hundred twenty-four".