211247485 has 16 divisors (see below), whose sum is σ = 263273472. Its totient is φ = 162547200.

The previous prime is 211247483. The next prime is 211247489. The reversal of 211247485 is 584742112.

It is not a de Polignac number, because 211247485 - 2¹ = 211247483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211247485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211247483) 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, 21805 + ... + 29965.

It is an arithmetic number, because the mean of its divisors is an integer number (16454592).

Almost surely, 2^211247485 is an apocalyptic number.

It is an amenable number.

211247485 is a deficient number, since it is larger than the sum of its proper divisors (52025987).

211247485 is a wasteful number, since it uses less digits than its factorization.

211247485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364.

The product of its digits is 17920, while the sum is 34.

The square root of 211247485 is about 14534.3553348609. The cubic root of 211247485 is about 595.5668491071.

Adding to 211247485 its reverse (584742112), we get a palindrome (795989597).

The spelling of 211247485 in words is "two hundred eleven million, two hundred forty-seven thousand, four hundred eighty-five".