211428274 has 4 divisors (see below), whose sum is σ = 317142414. Its totient is φ = 105714136.

The previous prime is 211428251. The next prime is 211428319. The reversal of 211428274 is 472824112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 130302225 + 81126049 = 11415^2 + 9007^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52857067 + ... + 52857070.

Almost surely, 2^211428274 is an apocalyptic number.

211428274 is a deficient number, since it is larger than the sum of its proper divisors (105714140).

211428274 is a wasteful number, since it uses less digits than its factorization.

211428274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105714139.

The product of its digits is 7168, while the sum is 31.

The square root of 211428274 is about 14540.5733724637. The cubic root of 211428274 is about 595.7366992300.

The spelling of 211428274 in words is "two hundred eleven million, four hundred twenty-eight thousand, two hundred seventy-four".