203109102 has 48 divisors (see below), whose sum is σ = 503998560. Its totient is φ = 57908736.

The previous prime is 203109097. The next prime is 203109103. The reversal of 203109102 is 201901302.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203109103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70278 + ... + 73110.

It is an arithmetic number, because the mean of its divisors is an integer number (10499970).

Almost surely, 2^203109102 is an apocalyptic number.

203109102 is an abundant number, since it is smaller than the sum of its proper divisors (300889458).

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

203109102 is a wasteful number, since it uses less digits than its factorization.

203109102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417 (or 3414 counting only the distinct ones).

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

The square root of 203109102 is about 14251.6350640900. The cubic root of 203109102 is about 587.8183355223.

The spelling of 203109102 in words is "two hundred three million, one hundred nine thousand, one hundred two".