31422210320 has 20 divisors (see below), whose sum is σ = 73056639180. Its totient is φ = 12568884096.

The previous prime is 31422210289. The next prime is 31422210367. The reversal of 31422210320 is 2301222413.

It can be written as a sum of positive squares in 2 ways, for example, as 21092333824 + 10329876496 = 145232^2 + 101636^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31422210292 and 31422210301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196388735 + ... + 196388894.

It is an arithmetic number, because the mean of its divisors is an integer number (3652831959).

Almost surely, 2^31422210320 is an apocalyptic number.

It is an amenable number.

31422210320 is an abundant number, since it is smaller than the sum of its proper divisors (41634428860).

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

31422210320 is a wasteful number, since it uses less digits than its factorization.

31422210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392777642 (or 392777636 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31422210320 its reverse (2301222413), we get a palindrome (33723432733).

The spelling of 31422210320 in words is "thirty-one billion, four hundred twenty-two million, two hundred ten thousand, three hundred twenty".