211216874 has 24 divisors (see below), whose sum is σ = 368738244. Its totient is φ = 90358400.

The previous prime is 211216861. The next prime is 211216877. The reversal of 211216874 is 478612112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 190578025 + 20638849 = 13805^2 + 4543^2 .

It is a super-2 number, since 2×211216874² = 89225135724663752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211216874.

It is not an unprimeable number, because it can be changed into a prime (211216877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21557 + ... + 29784.

Almost surely, 2^211216874 is an apocalyptic number.

211216874 is a deficient number, since it is larger than the sum of its proper divisors (157521370).

211216874 is a wasteful number, since it uses less digits than its factorization.

211216874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51382 (or 51371 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 211216874 is about 14533.3022400279. The cubic root of 211216874 is about 595.5380806739.

Adding to 211216874 its reverse (478612112), we get a palindrome (689828986).

The spelling of 211216874 in words is "two hundred eleven million, two hundred sixteen thousand, eight hundred seventy-four".