212241520 has 20 divisors (see below), whose sum is σ = 493461720. Its totient is φ = 84896576.

The previous prime is 212241499. The next prime is 212241559. The reversal of 212241520 is 25142212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326430 + ... + 1326589.

It is an arithmetic number, because the mean of its divisors is an integer number (24673086).

Almost surely, 2^212241520 is an apocalyptic number.

212241520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212241520 is an abundant number, since it is smaller than the sum of its proper divisors (281220200).

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

212241520 is a wasteful number, since it uses less digits than its factorization.

212241520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653032 (or 2653026 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 212241520 is about 14568.5112485799. The cubic root of 212241520 is about 596.4995436494.

Adding to 212241520 its reverse (25142212), we get a palindrome (237383732).

The spelling of 212241520 in words is "two hundred twelve million, two hundred forty-one thousand, five hundred twenty".