31220413444 has 24 divisors (see below), whose sum is σ = 59849941536. Its totient is φ = 14132208000.

The previous prime is 31220413423. The next prime is 31220413489. The reversal of 31220413444 is 44431402213.

It is a super-2 number, since 2×31220413444² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1461502 + ... + 1482709.

It is an arithmetic number, because the mean of its divisors is an integer number (2493747564).

Almost surely, 2^31220413444 is an apocalyptic number.

It is an amenable number.

31220413444 is a deficient number, since it is larger than the sum of its proper divisors (28629528092).

31220413444 is a wasteful number, since it uses less digits than its factorization.

31220413444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944467 (or 2944465 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31220413444 its reverse (44431402213), we get a palindrome (75651815657).

The spelling of 31220413444 in words is "thirty-one billion, two hundred twenty million, four hundred thirteen thousand, four hundred forty-four".