31244000405420 has 96 divisors (see below), whose sum is σ = 74988884146176. Its totient is φ = 10830852172800.

The previous prime is 31244000405407. The next prime is 31244000405473. The reversal of 31244000405420 is 2450400044213.

It is a super-2 number, since 2×31244000405420² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33731357 + ... + 34645236.

It is an arithmetic number, because the mean of its divisors is an integer number (781134209856).

Almost surely, 2^{31244000405420} is an apocalyptic number.

It is an amenable number.

31244000405420 is an abundant number, since it is smaller than the sum of its proper divisors (43744883740756).

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

31244000405420 is a wasteful number, since it uses less digits than its factorization.

31244000405420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68376711 (or 68376709 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 31244000405420 its reverse (2450400044213), we get a palindrome (33694400449633).

The spelling of 31244000405420 in words is "thirty-one trillion, two hundred forty-four billion, four hundred five thousand, four hundred twenty".