102231091 has 4 divisors (see below), whose sum is σ = 102347752. Its totient is φ = 102114432.

The previous prime is 102231083. The next prime is 102231097. The reversal of 102231091 is 190132201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102231091 - 2³ = 102231083 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 57006 + ... + 58771.

It is an arithmetic number, because the mean of its divisors is an integer number (25586938).

Almost surely, 2^102231091 is an apocalyptic number.

102231091 is a deficient number, since it is larger than the sum of its proper divisors (116661).

102231091 is an equidigital number, since it uses as much as digits as its factorization.

102231091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116660.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 102231091 is about 10110.9391749728. The cubic root of 102231091 is about 467.5854606555.

Adding to 102231091 its reverse (190132201), we get a palindrome (292363292).

The spelling of 102231091 in words is "one hundred two million, two hundred thirty-one thousand, ninety-one".