31422421140 has 96 divisors (see below), whose sum is σ = 98213423616. Its totient is φ = 7440397440.

The previous prime is 31422421139. The next prime is 31422421157. The reversal of 31422421140 is 4112422413.

It is a self number, because there is not a number n which added to its sum of digits gives 31422421140.

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, 525222 + ... + 581981.

It is an arithmetic number, because the mean of its divisors is an integer number (1023056496).

Almost surely, 2^31422421140 is an apocalyptic number.

31422421140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31422421140 is an abundant number, since it is smaller than the sum of its proper divisors (66791002476).

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

31422421140 is a wasteful number, since it uses less digits than its factorization.

31422421140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107269 (or 1107267 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 31422421140 its reverse (4112422413), we get a palindrome (35534843553).

The spelling of 31422421140 in words is "thirty-one billion, four hundred twenty-two million, four hundred twenty-one thousand, one hundred forty".