31232020 has 12 divisors (see below), whose sum is σ = 65587284. Its totient is φ = 12492800.

The previous prime is 31232011. The next prime is 31232023. The reversal of 31232020 is 2023213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24167056 + 7064964 = 4916^2 + 2658^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780781 + ... + 780820.

It is an arithmetic number, because the mean of its divisors is an integer number (5465607).

Almost surely, 2^31232020 is an apocalyptic number.

It is an amenable number.

31232020 is an abundant number, since it is smaller than the sum of its proper divisors (34355264).

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

31232020 is a wasteful number, since it uses less digits than its factorization.

31232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561610 (or 1561608 counting only the distinct ones).

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

The square root of 31232020 is about 5588.5615322729. The cubic root of 31232020 is about 314.9198418698.

Adding to 31232020 its reverse (2023213), we get a palindrome (33255233).

The spelling of 31232020 in words is "thirty-one million, two hundred thirty-two thousand, twenty".