211253540 has 12 divisors (see below), whose sum is σ = 443632476. Its totient is φ = 84501408.

The previous prime is 211253531. The next prime is 211253563. The reversal of 211253540 is 45352112.

211253540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 74269924 + 136983616 = 8618^2 + 11704^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5281319 + ... + 5281358.

It is an arithmetic number, because the mean of its divisors is an integer number (36969373).

Almost surely, 2^211253540 is an apocalyptic number.

211253540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211253540 is an abundant number, since it is smaller than the sum of its proper divisors (232378936).

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

211253540 is a wasteful number, since it uses less digits than its factorization.

211253540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10562686 (or 10562684 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 211253540 is about 14534.5636329406. The cubic root of 211253540 is about 595.5725393094.

The spelling of 211253540 in words is "two hundred eleven million, two hundred fifty-three thousand, five hundred forty".