213131246 has 16 divisors (see below), whose sum is σ = 342230400. Its totient is φ = 99244728.

The previous prime is 213131209. The next prime is 213131249. The reversal of 213131246 is 642131312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45290 + ... + 49773.

It is an arithmetic number, because the mean of its divisors is an integer number (21389400).

Almost surely, 2^213131246 is an apocalyptic number.

213131246 is a deficient number, since it is larger than the sum of its proper divisors (129099154).

213131246 is a wasteful number, since it uses less digits than its factorization.

213131246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95143.

The product of its digits is 864, while the sum is 23.

The square root of 213131246 is about 14599.0152407620. The cubic root of 213131246 is about 597.3318992805.

Adding to 213131246 its reverse (642131312), we get a palindrome (855262558).

The spelling of 213131246 in words is "two hundred thirteen million, one hundred thirty-one thousand, two hundred forty-six".