31322020 has 12 divisors (see below), whose sum is σ = 65776284. Its totient is φ = 12528800.

The previous prime is 31321987. The next prime is 31322023. The reversal of 31322020 is 2022313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8892324 + 22429696 = 2982^2 + 4736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 783031 + ... + 783070.

It is an arithmetic number, because the mean of its divisors is an integer number (5481357).

Almost surely, 2^31322020 is an apocalyptic number.

It is an amenable number.

31322020 is an abundant number, since it is smaller than the sum of its proper divisors (34454264).

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

31322020 is a wasteful number, since it uses less digits than its factorization.

31322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566110 (or 1566108 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31322020 is about 5596.6079012202. The cubic root of 31322020 is about 315.2220488626. Note that the first 3 decimals are identical.

Adding to 31322020 its reverse (2022313), we get a palindrome (33344333).

The spelling of 31322020 in words is "thirty-one million, three hundred twenty-two thousand, twenty".