31320220223100 has 72 divisors (see below), whose sum is σ = 93744659176560. Its totient is φ = 8064056698880.

The previous prime is 31320220223069. The next prime is 31320220223111. The reversal of 31320220223100 is 132202202313.

It is a happy number.

It is a super-2 number, since 2×31320220223100² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1800003957 + ... + 1800021356.

It is an arithmetic number, because the mean of its divisors is an integer number (1302009155230).

Almost surely, 2^{31320220223100} is an apocalyptic number.

31320220223100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31320220223100 is an abundant number, since it is smaller than the sum of its proper divisors (62424438953460).

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

31320220223100 is a wasteful number, since it uses less digits than its factorization.

31320220223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600025359 (or 3600025352 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31320220223100 its reverse (132202202313), we get a palindrome (31452422425413).

The spelling of 31320220223100 in words is "thirty-one trillion, three hundred twenty billion, two hundred twenty million, two hundred twenty-three thousand, one hundred".