211115146 has 64 divisors (see below), whose sum is σ = 383201280. Its totient is φ = 86112000.

The previous prime is 211115143. The next prime is 211115159. The reversal of 211115146 is 641511112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (211115143) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 1518745 + ... + 1518883.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^211115146 is an apocalyptic number.

211115146 is a deficient number, since it is larger than the sum of its proper divisors (172086134).

211115146 is a wasteful number, since it uses less digits than its factorization.

211115146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its digits is 240, while the sum is 22.

The square root of 211115146 is about 14529.8019945215. The cubic root of 211115146 is about 595.4424560118.

Adding to 211115146 its reverse (641511112), we get a palindrome (852626258).

The spelling of 211115146 in words is "two hundred eleven million, one hundred fifteen thousand, one hundred forty-six".