211401040 has 20 divisors (see below), whose sum is σ = 491507604. Its totient is φ = 84560384.

The previous prime is 211401037. The next prime is 211401053. The reversal of 211401040 is 40104112.

It can be written as a sum of positive squares in 2 ways, for example, as 92852496 + 118548544 = 9636^2 + 10888^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 211401040.

It is a congruent 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 in 3 ways as a sum of consecutive naturals, for example, 1321177 + ... + 1321336.

Almost surely, 2^211401040 is an apocalyptic number.

211401040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211401040 is an abundant number, since it is smaller than the sum of its proper divisors (280106564).

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

211401040 is a wasteful number, since it uses less digits than its factorization.

211401040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642526 (or 2642520 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 211401040 is about 14539.6368592892. The cubic root of 211401040 is about 595.7111192549.

Adding to 211401040 its reverse (40104112), we get a palindrome (251505152).

The spelling of 211401040 in words is "two hundred eleven million, four hundred one thousand, forty".