31032240220 has 12 divisors (see below), whose sum is σ = 65167704504. Its totient is φ = 12412896080.

The previous prime is 31032240209. The next prime is 31032240227. The reversal of 31032240220 is 2204223013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032240227) 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, 775805986 + ... + 775806025.

It is an arithmetic number, because the mean of its divisors is an integer number (5430642042).

Almost surely, 2^31032240220 is an apocalyptic number.

It is an amenable number.

31032240220 is an abundant number, since it is smaller than the sum of its proper divisors (34135464284).

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

31032240220 is a wasteful number, since it uses less digits than its factorization.

31032240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551612020 (or 1551612018 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 31032240220 its reverse (2204223013), we get a palindrome (33236463233).

The spelling of 31032240220 in words is "thirty-one billion, thirty-two million, two hundred forty thousand, two hundred twenty".