31230220110 has 16 divisors (see below), whose sum is σ = 74952528336. Its totient is φ = 8328058688.

The previous prime is 31230220079. The next prime is 31230220139. The reversal of 31230220110 is 1102203213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31230220110.

It is a congruent number.

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, 520503639 + ... + 520503698.

It is an arithmetic number, because the mean of its divisors is an integer number (4684533021).

Almost surely, 2^31230220110 is an apocalyptic number.

31230220110 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31230220110 is an abundant number, since it is smaller than the sum of its proper divisors (43722308226).

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

31230220110 is a wasteful number, since it uses less digits than its factorization.

31230220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041007347.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31230220110 its reverse (1102203213), we get a palindrome (32332423323).

The spelling of 31230220110 in words is "thirty-one billion, two hundred thirty million, two hundred twenty thousand, one hundred ten".