213621061641 has 16 divisors (see below), whose sum is σ = 306746267520. Its totient is φ = 131455543680.

The previous prime is 213621061631. The next prime is 213621061691. The reversal of 213621061641 is 146160126312.

213621061641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213621061641 - 2¹⁰ = 213621060617 is a prime.

It is a super-2 number, since 2×213621061641² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213621061631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2563845 + ... + 2645853.

It is an arithmetic number, because the mean of its divisors is an integer number (19171641720).

Almost surely, 2^213621061641 is an apocalyptic number.

It is an amenable number.

213621061641 is a deficient number, since it is larger than the sum of its proper divisors (93125205879).

213621061641 is a wasteful number, since it uses less digits than its factorization.

213621061641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148816.

The product of its (nonzero) digits is 10368, while the sum is 33.

Adding to 213621061641 its reverse (146160126312), we get a palindrome (359781187953).

The spelling of 213621061641 in words is "two hundred thirteen billion, six hundred twenty-one million, sixty-one thousand, six hundred forty-one".