211534040 has 32 divisors (see below), whose sum is σ = 476783280. Its totient is φ = 84465792.

The previous prime is 211534007. The next prime is 211534061. The reversal of 211534040 is 40435112.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 20207 + ... + 28833.

Almost surely, 2^211534040 is an apocalyptic number.

211534040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211534040 is an abundant number, since it is smaller than the sum of its proper divisors (265249240).

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

211534040 is a wasteful number, since it uses less digits than its factorization.

211534040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9251 (or 9247 counting only the distinct ones).

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

The square root of 211534040 is about 14544.2098444708. The cubic root of 211534040 is about 595.8360208311.

Adding to 211534040 its reverse (40435112), we get a palindrome (251969152).

The spelling of 211534040 in words is "two hundred eleven million, five hundred thirty-four thousand, forty".