211315340 has 24 divisors (see below), whose sum is σ = 467118960. Its totient is φ = 80077248.

The previous prime is 211315339. The next prime is 211315343. The reversal of 211315340 is 43513112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (211315343) 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, 277667 + ... + 278426.

It is an arithmetic number, because the mean of its divisors is an integer number (19463290).

Almost surely, 2^211315340 is an apocalyptic number.

211315340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211315340 is an abundant number, since it is smaller than the sum of its proper divisors (255803620).

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

211315340 is a wasteful number, since it uses less digits than its factorization.

211315340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556121 (or 556119 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 211315340 is about 14536.6894442992. The cubic root of 211315340 is about 595.6306098068.

Adding to 211315340 its reverse (43513112), we get a palindrome (254828452).

The spelling of 211315340 in words is "two hundred eleven million, three hundred fifteen thousand, three hundred forty".