213122641 has 4 divisors (see below), whose sum is σ = 213202432. Its totient is φ = 213042852.

The previous prime is 213122629. The next prime is 213122671. The reversal of 213122641 is 146221312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213122641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213122671) 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 3 ways as a sum of consecutive naturals, for example, 35745 + ... + 41278.

It is an arithmetic number, because the mean of its divisors is an integer number (53300608).

Almost surely, 2^213122641 is an apocalyptic number.

It is an amenable number.

213122641 is a deficient number, since it is larger than the sum of its proper divisors (79791).

213122641 is an equidigital number, since it uses as much as digits as its factorization.

213122641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79790.

The product of its digits is 576, while the sum is 22.

The square root of 213122641 is about 14598.7205261283. The cubic root of 213122641 is about 597.3238602431.

Adding to 213122641 its reverse (146221312), we get a palindrome (359343953).

The spelling of 213122641 in words is "two hundred thirteen million, one hundred twenty-two thousand, six hundred forty-one".