213315740 has 72 divisors (see below), whose sum is σ = 496126176. Its totient is φ = 76982400.

The previous prime is 213315691. The next prime is 213315749. The reversal of 213315740 is 47513312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213315749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 437777 + ... + 438263.

Almost surely, 2^213315740 is an apocalyptic number.

213315740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213315740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248063088).

213315740 is an abundant number, since it is smaller than the sum of its proper divisors (282810436).

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

213315740 is a wasteful number, since it uses less digits than its factorization.

213315740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 213315740 is about 14605.3325877914. The cubic root of 213315740 is about 597.5042068295.

The spelling of 213315740 in words is "two hundred thirteen million, three hundred fifteen thousand, seven hundred forty".