211185380 has 48 divisors (see below), whose sum is σ = 533527680. Its totient is φ = 68594688.

The previous prime is 211185353. The next prime is 211185397. The reversal of 211185380 is 83581112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37037 + ... + 42356.

It is an arithmetic number, because the mean of its divisors is an integer number (11115160).

Almost surely, 2^211185380 is an apocalyptic number.

211185380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211185380 is an abundant number, since it is smaller than the sum of its proper divisors (322342300).

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

211185380 is a wasteful number, since it uses less digits than its factorization.

211185380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79428 (or 79426 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 211185380 is about 14532.2186881426. The cubic root of 211185380 is about 595.5084794900.

The spelling of 211185380 in words is "two hundred eleven million, one hundred eighty-five thousand, three hundred eighty".