213700520 has 96 divisors (see below), whose sum is σ = 537213600. Its totient is φ = 76433280.

The previous prime is 213700511. The next prime is 213700561. The reversal of 213700520 is 25007312.

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

It is a junction number, because it is equal to n+sod(n) for n = 213700492 and 213700501.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 323951 + ... + 324609.

It is an arithmetic number, because the mean of its divisors is an integer number (5595975).

Almost surely, 2^213700520 is an apocalyptic number.

213700520 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 213700520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268606800).

213700520 is an abundant number, since it is smaller than the sum of its proper divisors (323513080).

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

213700520 is a wasteful number, since it uses less digits than its factorization.

213700520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 213700520 is about 14618.4992389780. The cubic root of 213700520 is about 597.8632513939.

Adding to 213700520 its reverse (25007312), we get a palindrome (238707832).

The spelling of 213700520 in words is "two hundred thirteen million, seven hundred thousand, five hundred twenty".