31224131420 has 12 divisors (see below), whose sum is σ = 65570676024. Its totient is φ = 12489652560.

The previous prime is 31224131399. The next prime is 31224131431. The reversal of 31224131420 is 2413142213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780603266 + ... + 780603305.

It is an arithmetic number, because the mean of its divisors is an integer number (5464223002).

Almost surely, 2^31224131420 is an apocalyptic number.

It is an amenable number.

31224131420 is an abundant number, since it is smaller than the sum of its proper divisors (34346544604).

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

31224131420 is a wasteful number, since it uses less digits than its factorization.

31224131420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561206580 (or 1561206578 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31224131420 its reverse (2413142213), we get a palindrome (33637273633).

The spelling of 31224131420 in words is "thirty-one billion, two hundred twenty-four million, one hundred thirty-one thousand, four hundred twenty".