102181838 has 12 divisors (see below), whose sum is σ = 168473760. Its totient is φ = 46446180.

The previous prime is 102181817. The next prime is 102181843. The reversal of 102181838 is 838181201.

It is a happy number.

It is a super-2 number, since 2×102181838² = 20882256034116488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210878 + ... + 211361.

It is an arithmetic number, because the mean of its divisors is an integer number (14039480).

Almost surely, 2^102181838 is an apocalyptic number.

102181838 is a deficient number, since it is larger than the sum of its proper divisors (66291922).

102181838 is a wasteful number, since it uses less digits than its factorization.

102181838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422263 (or 422252 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 102181838 is about 10108.5032522130. The cubic root of 102181838 is about 467.5103573253.

The spelling of 102181838 in words is "one hundred two million, one hundred eighty-one thousand, eight hundred thirty-eight".