201681902 has 16 divisors (see below), whose sum is σ = 304935840. Its totient is φ = 100039968.

The previous prime is 201681901. The next prime is 201681919. The reversal of 201681902 is 209186102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201681901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218999 + ... + 219917.

It is an arithmetic number, because the mean of its divisors is an integer number (19058490).

Almost surely, 2^201681902 is an apocalyptic number.

201681902 is a deficient number, since it is larger than the sum of its proper divisors (103253938).

201681902 is a wasteful number, since it uses less digits than its factorization.

201681902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 201681902 is about 14201.4753458928. The cubic root of 201681902 is about 586.4382775052.

The spelling of 201681902 in words is "two hundred one million, six hundred eighty-one thousand, nine hundred two".