212131147 has 4 divisors (see below), whose sum is σ = 212161096. Its totient is φ = 212101200.

The previous prime is 212131133. The next prime is 212131187. The reversal of 212131147 is 741131212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212131147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212131187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2272 + ... + 20722.

It is an arithmetic number, because the mean of its divisors is an integer number (53040274).

Almost surely, 2^212131147 is an apocalyptic number.

212131147 is a deficient number, since it is larger than the sum of its proper divisors (29949).

212131147 is a wasteful number, since it uses less digits than its factorization.

212131147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29948.

The product of its digits is 336, while the sum is 22.

The square root of 212131147 is about 14564.7226887435. The cubic root of 212131147 is about 596.3961255246.

Adding to 212131147 its reverse (741131212), we get a palindrome (953262359).

The spelling of 212131147 in words is "two hundred twelve million, one hundred thirty-one thousand, one hundred forty-seven".