211693880 has 16 divisors (see below), whose sum is σ = 476311320. Its totient is φ = 84677536.

The previous prime is 211693849. The next prime is 211693883. The reversal of 211693880 is 88396112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211693883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2646134 + ... + 2646213.

Almost surely, 2^211693880 is an apocalyptic number.

211693880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211693880 is an abundant number, since it is smaller than the sum of its proper divisors (264617440).

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

211693880 is a wasteful number, since it uses less digits than its factorization.

211693880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5292358 (or 5292354 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 211693880 is about 14549.7037770533. The cubic root of 211693880 is about 595.9860588604.

The spelling of 211693880 in words is "two hundred eleven million, six hundred ninety-three thousand, eight hundred eighty".