211453220 has 24 divisors (see below), whose sum is σ = 484420608. Its totient is φ = 76892000.

The previous prime is 211453219. The next prime is 211453241. The reversal of 211453220 is 22354112.

211453220 = 462² + 463² + ... + 901².

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211453192 and 211453201.

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 7 ways as a sum of consecutive naturals, for example, 480356 + ... + 480795.

It is an arithmetic number, because the mean of its divisors is an integer number (20184192).

Almost surely, 2^211453220 is an apocalyptic number.

211453220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211453220 is an abundant number, since it is smaller than the sum of its proper divisors (272967388).

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

211453220 is a wasteful number, since it uses less digits than its factorization.

211453220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961171 (or 961169 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 211453220 is about 14541.4311537758. The cubic root of 211453220 is about 595.7601282366.

The spelling of 211453220 in words is "two hundred eleven million, four hundred fifty-three thousand, two hundred twenty".