213247146 has 32 divisors (see below), whose sum is σ = 513077760. Its totient is φ = 57720816.

The previous prime is 213247129. The next prime is 213247147. The reversal of 213247146 is 641742312.

213247146 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213247147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132816 + ... + 134411.

It is an arithmetic number, because the mean of its divisors is an integer number (16033680).

Almost surely, 2^213247146 is an apocalyptic number.

213247146 is an abundant number, since it is smaller than the sum of its proper divisors (299830614).

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

213247146 is a wasteful number, since it uses less digits than its factorization.

213247146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267258.

The product of its digits is 8064, while the sum is 30.

The square root of 213247146 is about 14602.9841470845. The cubic root of 213247146 is about 597.4401553013.

Adding to 213247146 its reverse (641742312), we get a palindrome (854989458).

The spelling of 213247146 in words is "two hundred thirteen million, two hundred forty-seven thousand, one hundred forty-six".