211532140 has 48 divisors (see below), whose sum is σ = 457158240. Its totient is φ = 82183680.

The previous prime is 211532137. The next prime is 211532141. The reversal of 211532140 is 41235112.

It is not an unprimeable number, because it can be changed into a prime (211532141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100216 + ... + 102304.

It is an arithmetic number, because the mean of its divisors is an integer number (9524130).

Almost surely, 2^211532140 is an apocalyptic number.

211532140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211532140 is an abundant number, since it is smaller than the sum of its proper divisors (245626100).

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

211532140 is a wasteful number, since it uses less digits than its factorization.

211532140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 211532140 is about 14544.1445262346. The cubic root of 211532140 is about 595.8342368915.

Adding to 211532140 its reverse (41235112), we get a palindrome (252767252).

The spelling of 211532140 in words is "two hundred eleven million, five hundred thirty-two thousand, one hundred forty".