211130520 has 64 divisors (see below), whose sum is σ = 634439520. Its totient is φ = 56208384.

The previous prime is 211130509. The next prime is 211130537. The reversal of 211130520 is 25031112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211130520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101814 + ... + 103866.

Almost surely, 2^211130520 is an apocalyptic number.

211130520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211130520 is an abundant number, since it is smaller than the sum of its proper divisors (423309000).

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

211130520 is a wasteful number, since it uses less digits than its factorization.

211130520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 211130520 is about 14530.3310354582. The cubic root of 211130520 is about 595.4569095936.

Adding to 211130520 its reverse (25031112), we get a palindrome (236161632).

The spelling of 211130520 in words is "two hundred eleven million, one hundred thirty thousand, five hundred twenty".