211157140 has 12 divisors (see below), whose sum is σ = 443430036. Its totient is φ = 84462848.

The previous prime is 211157129. The next prime is 211157179. The reversal of 211157140 is 41751112.

It can be written as a sum of positive squares in 2 ways, for example, as 113976976 + 97180164 = 10676^2 + 9858^2 .

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, 5278909 + ... + 5278948.

It is an arithmetic number, because the mean of its divisors is an integer number (36952503).

Almost surely, 2^211157140 is an apocalyptic number.

211157140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211157140 is an abundant number, since it is smaller than the sum of its proper divisors (232272896).

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

211157140 is a wasteful number, since it uses less digits than its factorization.

211157140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10557866 (or 10557864 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 211157140 is about 14531.2470215051. The cubic root of 211157140 is about 595.4819342352.

The spelling of 211157140 in words is "two hundred eleven million, one hundred fifty-seven thousand, one hundred forty".