31244142420 has 96 divisors (see below), whose sum is σ = 98296329600. Its totient is φ = 8238143232.

The previous prime is 31244142403. The next prime is 31244142451. The reversal of 31244142420 is 2424144213.

31244142420 is a `hidden beast` number, since 3 + 1 + 2 + 4 + 414 + 242 + 0 = 666.

It is a super-2 number, since 2×31244142420² (a number of 22 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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276994 + ... + 373113.

It is an arithmetic number, because the mean of its divisors is an integer number (1023920100).

Almost surely, 2^31244142420 is an apocalyptic number.

31244142420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31244142420 is an abundant number, since it is smaller than the sum of its proper divisors (67052187180).

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

31244142420 is a wasteful number, since it uses less digits than its factorization.

31244142420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650214 (or 650206 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 31244142420 its reverse (2424144213), we get a palindrome (33668286633).

The spelling of 31244142420 in words is "thirty-one billion, two hundred forty-four million, one hundred forty-two thousand, four hundred twenty".