213141440 has 28 divisors (see below), whose sum is σ = 507543816. Its totient is φ = 85256448.

The previous prime is 213141421. The next prime is 213141443. The reversal of 213141440 is 44141312.

213141440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213141443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332714 + ... + 333353.

Almost surely, 2^213141440 is an apocalyptic number.

213141440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213141440 is an abundant number, since it is smaller than the sum of its proper divisors (294402376).

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

213141440 is an equidigital number, since it uses as much as digits as its factorization.

213141440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666084 (or 666074 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 213141440 is about 14599.3643697251. The cubic root of 213141440 is about 597.3414225272.

Adding to 213141440 its reverse (44141312), we get a palindrome (257282752).

The spelling of 213141440 in words is "two hundred thirteen million, one hundred forty-one thousand, four hundred forty".