211265920 has 32 divisors (see below), whose sum is σ = 505059120. Its totient is φ = 84506112.

The previous prime is 211265891. The next prime is 211265933. The reversal of 211265920 is 29562112.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 164412 + ... + 165691.

Almost surely, 2^211265920 is an apocalyptic number.

211265920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211265920 is an abundant number, since it is smaller than the sum of its proper divisors (293793200).

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

211265920 is an equidigital number, since it uses as much as digits as its factorization.

211265920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330122 (or 330110 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 211265920 is about 14534.9895080801. The cubic root of 211265920 is about 595.5841731090.

The spelling of 211265920 in words is "two hundred eleven million, two hundred sixty-five thousand, nine hundred twenty".