102231220 has 48 divisors (see below), whose sum is σ = 264233088. Its totient is φ = 32353920.

The previous prime is 102231193. The next prime is 102231277. The reversal of 102231220 is 22132201.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 102231220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26266 + ... + 29905.

It is an arithmetic number, because the mean of its divisors is an integer number (5504856).

Almost surely, 2^102231220 is an apocalyptic number.

102231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102231220 is an abundant number, since it is smaller than the sum of its proper divisors (162001868).

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

102231220 is a wasteful number, since it uses less digits than its factorization.

102231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56200 (or 56198 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102231220 is about 10110.9455542002. The cubic root of 102231220 is about 467.5856573292.

Adding to 102231220 its reverse (22132201), we get a palindrome (124363421).

The spelling of 102231220 in words is "one hundred two million, two hundred thirty-one thousand, two hundred twenty".