31220044404 has 96 divisors (see below), whose sum is σ = 74824458240. Its totient is φ = 10128678912.

The previous prime is 31220044403. The next prime is 31220044409. The reversal of 31220044404 is 40444002213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220044403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28720749 + ... + 28721835.

It is an arithmetic number, because the mean of its divisors is an integer number (779421440).

Almost surely, 2^31220044404 is an apocalyptic number.

It is an amenable number.

31220044404 is an abundant number, since it is smaller than the sum of its proper divisors (43604413836).

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

31220044404 is a wasteful number, since it uses less digits than its factorization.

31220044404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 31220044404 its reverse (40444002213), we get a palindrome (71664046617).

The spelling of 31220044404 in words is "thirty-one billion, two hundred twenty million, forty-four thousand, four hundred four".