211303240 has 32 divisors (see below), whose sum is σ = 476280000. Its totient is φ = 84370624.

The previous prime is 211303229. The next prime is 211303241. The reversal of 211303240 is 42303112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (211303241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19551 + ... + 28369.

It is an arithmetic number, because the mean of its divisors is an integer number (14883750).

Almost surely, 2^211303240 is an apocalyptic number.

211303240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211303240 is an abundant number, since it is smaller than the sum of its proper divisors (264976760).

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

211303240 is a wasteful number, since it uses less digits than its factorization.

211303240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9429 (or 9425 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 211303240 is about 14536.2732500459. The cubic root of 211303240 is about 595.6192409083.

Adding to 211303240 its reverse (42303112), we get a palindrome (253606352).

The spelling of 211303240 in words is "two hundred eleven million, three hundred three thousand, two hundred forty".