213441720 has 64 divisors (see below), whose sum is σ = 641291040. Its totient is φ = 56832000.

The previous prime is 213441719. The next prime is 213441733. The reversal of 213441720 is 27144312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 143380 + ... + 144860.

Almost surely, 2^213441720 is an apocalyptic number.

213441720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213441720 is an abundant number, since it is smaller than the sum of its proper divisors (427849320).

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

213441720 is a wasteful number, since it uses less digits than its factorization.

213441720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2692 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 213441720 is about 14609.6447595416. The cubic root of 213441720 is about 597.6218083506.

The spelling of 213441720 in words is "two hundred thirteen million, four hundred forty-one thousand, seven hundred twenty".