31422420304 has 60 divisors (see below), whose sum is σ = 66955128660. Its totient is φ = 14275148800.

The previous prime is 31422420299. The next prime is 31422420307. The reversal of 31422420304 is 40302422413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6748293904 + 24674126400 = 82148^2 + 157080^2 .

It is a super-2 number, since 2×31422420304² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422420307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5047914 + ... + 5054134.

It is an arithmetic number, because the mean of its divisors is an integer number (1115918811).

Almost surely, 2^31422420304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31422420304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33477564330).

31422420304 is an abundant number, since it is smaller than the sum of its proper divisors (35532708356).

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

31422420304 is a wasteful number, since it uses less digits than its factorization.

31422420304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860 (or 8843 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 31422420304 its reverse (40302422413), we get a palindrome (71724842717).

The spelling of 31422420304 in words is "thirty-one billion, four hundred twenty-two million, four hundred twenty thousand, three hundred four".