102231090 has 192 divisors, whose sum is σ = 311351040. Its totient is φ = 23063040.

The previous prime is 102231083. The next prime is 102231097. The reversal of 102231090 is 90132201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102231083) and next prime (102231097).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102231097) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 780325 + ... + 780455.

It is an arithmetic number, because the mean of its divisors is an integer number (1621620).

Almost surely, 2^102231090 is an apocalyptic number.

102231090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102231090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155675520).

102231090 is an abundant number, since it is smaller than the sum of its proper divisors (209119950).

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

102231090 is a wasteful number, since it uses less digits than its factorization.

102231090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 102231090 is about 10110.9391255214. The cubic root of 102231090 is about 467.5854591309.

Adding to 102231090 its reverse (90132201), we get a palindrome (192363291).

The spelling of 102231090 in words is "one hundred two million, two hundred thirty-one thousand, ninety".