213701220 has 96 divisors (see below), whose sum is σ = 703987200. Its totient is φ = 53632512.

The previous prime is 213701209. The next prime is 213701263. The reversal of 213701220 is 22107312.

213701220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213701220² = 91336422858976800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213701193 and 213701202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2460 + ... + 20819.

It is an arithmetic number, because the mean of its divisors is an integer number (7333200).

Almost surely, 2^213701220 is an apocalyptic number.

213701220 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 213701220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351993600).

213701220 is an abundant number, since it is smaller than the sum of its proper divisors (490285980).

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

213701220 is a wasteful number, since it uses less digits than its factorization.

213701220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23314 (or 23306 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 213701220 is about 14618.5231812246. The cubic root of 213701220 is about 597.8639041826.

Adding to 213701220 its reverse (22107312), we get a palindrome (235808532).

The spelling of 213701220 in words is "two hundred thirteen million, seven hundred one thousand, two hundred twenty".