31422421240 has 64 divisors (see below), whose sum is σ = 85553496000. Its totient is φ = 10139670528.

The previous prime is 31422421157. The next prime is 31422421307. The reversal of 31422421240 is 4212422413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3295915 + ... + 3305434.

It is an arithmetic number, because the mean of its divisors is an integer number (1336773375).

Almost surely, 2^31422421240 is an apocalyptic number.

It is an amenable number.

31422421240 is an abundant number, since it is smaller than the sum of its proper divisors (54131074760).

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

31422421240 is a wasteful number, since it uses less digits than its factorization.

31422421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601384 (or 6601380 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 31422421240 its reverse (4212422413), we get a palindrome (35634843653).

The spelling of 31422421240 in words is "thirty-one billion, four hundred twenty-two million, four hundred twenty-one thousand, two hundred forty".