213113440 has 24 divisors (see below), whose sum is σ = 503480880. Its totient is φ = 85245312.

The previous prime is 213113413. The next prime is 213113441. The reversal of 213113440 is 44311312.

213113440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213113441) 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, 665820 + ... + 666139.

It is an arithmetic number, because the mean of its divisors is an integer number (20978370).

Almost surely, 2^213113440 is an apocalyptic number.

213113440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213113440 is an abundant number, since it is smaller than the sum of its proper divisors (290367440).

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

213113440 is a wasteful number, since it uses less digits than its factorization.

213113440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331974 (or 1331966 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 213113440 is about 14598.4053923708. The cubic root of 213113440 is about 597.3152641661.

Adding to 213113440 its reverse (44311312), we get a palindrome (257424752).

The spelling of 213113440 in words is "two hundred thirteen million, one hundred thirteen thousand, four hundred forty".