213531313453 has 2 divisors, whose sum is σ = 213531313454. Its totient is φ = 213531313452.

The previous prime is 213531313447. The next prime is 213531313469. The reversal of 213531313453 is 354313135312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213520698889 + 10614564 = 462083^2 + 3258^2 .

It is a cyclic number.

It is not a de Polignac number, because 213531313453 - 2²¹ = 213529216301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213531313403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106765656726 + 106765656727.

It is an arithmetic number, because the mean of its divisors is an integer number (106765656727).

Almost surely, 2^213531313453 is an apocalyptic number.

It is an amenable number.

213531313453 is a deficient number, since it is larger than the sum of its proper divisors (1).

213531313453 is an equidigital number, since it uses as much as digits as its factorization.

213531313453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 34.

Adding to 213531313453 its reverse (354313135312), we get a palindrome (567844448765).

The spelling of 213531313453 in words is "two hundred thirteen billion, five hundred thirty-one million, three hundred thirteen thousand, four hundred fifty-three".