211451140 has 24 divisors (see below), whose sum is σ = 444951360. Its totient is φ = 84408288.

The previous prime is 211451111. The next prime is 211451147. The reversal of 211451140 is 41154112.

It is not an unprimeable number, because it can be changed into a prime (211451147) 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 7 ways as a sum of consecutive naturals, for example, 450 + ... + 20569.

It is an arithmetic number, because the mean of its divisors is an integer number (18539640).

Almost surely, 2^211451140 is an apocalyptic number.

211451140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211451140 is an abundant number, since it is smaller than the sum of its proper divisors (233500220).

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

211451140 is a wasteful number, since it uses less digits than its factorization.

211451140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21531 (or 21529 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 211451140 is about 14541.3596338169. The cubic root of 211451140 is about 595.7581747940.

The spelling of 211451140 in words is "two hundred eleven million, four hundred fifty-one thousand, one hundred forty".