213220320043631 has 2 divisors, whose sum is σ = 213220320043632. Its totient is φ = 213220320043630.

The previous prime is 213220320043513. The next prime is 213220320043637. The reversal of 213220320043631 is 136340023022312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213220320043631 - 2³⁰ = 213219246301807 is a prime.

It is a super-2 number, since 2×213220320043631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213220320043637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610160021815 + 106610160021816.

It is an arithmetic number, because the mean of its divisors is an integer number (106610160021816).

Almost surely, 2^{213220320043631} is an apocalyptic number.

213220320043631 is a deficient number, since it is larger than the sum of its proper divisors (1).

213220320043631 is an equidigital number, since it uses as much as digits as its factorization.

213220320043631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 213220320043631 its reverse (136340023022312), we get a palindrome (349560343065943).

The spelling of 213220320043631 in words is "two hundred thirteen trillion, two hundred twenty billion, three hundred twenty million, forty-three thousand, six hundred thirty-one".