213231560 has 32 divisors (see below), whose sum is σ = 483235200. Its totient is φ = 84676800.

The previous prime is 213231521. The next prime is 213231583. The reversal of 213231560 is 65132312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13616 + ... + 24735.

It is an arithmetic number, because the mean of its divisors is an integer number (15101100).

Almost surely, 2^213231560 is an apocalyptic number.

213231560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213231560 is an abundant number, since it is smaller than the sum of its proper divisors (270003640).

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

213231560 is a wasteful number, since it uses less digits than its factorization.

213231560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38501 (or 38497 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 213231560 is about 14602.4504792860. The cubic root of 213231560 is about 597.4255995314.

Adding to 213231560 its reverse (65132312), we get a palindrome (278363872).

The spelling of 213231560 in words is "two hundred thirteen million, two hundred thirty-one thousand, five hundred sixty".