211540430 has 32 divisors (see below), whose sum is σ = 400025088. Its totient is φ = 80388000.

The previous prime is 211540423. The next prime is 211540447. The reversal of 211540430 is 34045112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31685 + ... + 37775.

It is an arithmetic number, because the mean of its divisors is an integer number (12500784).

Almost surely, 2^211540430 is an apocalyptic number.

211540430 is a deficient number, since it is larger than the sum of its proper divisors (188484658).

211540430 is a wasteful number, since it uses less digits than its factorization.

211540430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 211540430 is about 14544.4295178601. The cubic root of 211540430 is about 595.8420204231.

Adding to 211540430 its reverse (34045112), we get a palindrome (245585542).

It can be divided in two parts, 21 and 1540430, that added together give a palindrome (1540451).

The spelling of 211540430 in words is "two hundred eleven million, five hundred forty thousand, four hundred thirty".