102231945 has 12 divisors (see below), whose sum is σ = 177202116. Its totient is φ = 54523680.

The previous prime is 102231937. The next prime is 102231967. The reversal of 102231945 is 549132201.

It can be written as a sum of positive squares in 2 ways, for example, as 47279376 + 54952569 = 6876^2 + 7413^2 .

It is not a de Polignac number, because 102231945 - 2³ = 102231937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1135866 + ... + 1135955.

It is an arithmetic number, because the mean of its divisors is an integer number (14766843).

Almost surely, 2^102231945 is an apocalyptic number.

102231945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102231945 is a deficient number, since it is larger than the sum of its proper divisors (74970171).

102231945 is a wasteful number, since it uses less digits than its factorization.

102231945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271832 (or 2271829 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 102231945 is about 10110.9814063720. The cubic root of 102231945 is about 467.5867626628.

The spelling of 102231945 in words is "one hundred two million, two hundred thirty-one thousand, nine hundred forty-five".