210981072 has 20 divisors (see below), whose sum is σ = 545034560. Its totient is φ = 70327008.

The previous prime is 210981049. The next prime is 210981097. The reversal of 210981072 is 270189012.

It is an alternating number because its digits alternate between even and odd.

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 in 3 ways as a sum of consecutive naturals, for example, 2197672 + ... + 2197767.

It is an arithmetic number, because the mean of its divisors is an integer number (27251728).

Almost surely, 2^210981072 is an apocalyptic number.

It is an amenable number.

210981072 is an abundant number, since it is smaller than the sum of its proper divisors (334053488).

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

210981072 is a wasteful number, since it uses less digits than its factorization.

210981072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395450 (or 4395444 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 210981072 is about 14525.1875030927. The cubic root of 210981072 is about 595.3163790669.

The spelling of 210981072 in words is "two hundred ten million, nine hundred eighty-one thousand, seventy-two".