211222040 has 32 divisors (see below), whose sum is σ = 477243360. Its totient is φ = 84134400.

The previous prime is 211222019. The next prime is 211222057. The reversal of 211222040 is 40222112.

It is a super-2 number, since 2×211222040² = 89229500363523200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316 + ... + 20595.

It is an arithmetic number, because the mean of its divisors is an integer number (14913855).

Almost surely, 2^211222040 is an apocalyptic number.

211222040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222040 is an abundant number, since it is smaller than the sum of its proper divisors (266021320).

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

211222040 is a wasteful number, since it uses less digits than its factorization.

211222040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22163 (or 22159 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 211222040 is about 14533.4799686792. The cubic root of 211222040 is about 595.5429359120.

Adding to 211222040 its reverse (40222112), we get a palindrome (251444152).

The spelling of 211222040 in words is "two hundred eleven million, two hundred twenty-two thousand, forty".