210081904 has 10 divisors (see below), whose sum is σ = 407033720. Its totient is φ = 105040944.

The previous prime is 210081889. The next prime is 210081941. The reversal of 210081904 is 409180012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565044 + ... + 6565075.

It is an arithmetic number, because the mean of its divisors is an integer number (40703372).

Almost surely, 2^210081904 is an apocalyptic number.

It is an amenable number.

210081904 is a deficient number, since it is larger than the sum of its proper divisors (196951816).

210081904 is a wasteful number, since it uses less digits than its factorization.

210081904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13130127 (or 13130121 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 210081904 is about 14494.2024271776. The cubic root of 210081904 is about 594.4694599916.

The spelling of 210081904 in words is "two hundred ten million, eighty-one thousand, nine hundred four".