213420203035531 has 2 divisors, whose sum is σ = 213420203035532. Its totient is φ = 213420203035530.

The previous prime is 213420203035519. The next prime is 213420203035631. The reversal of 213420203035531 is 135530302024312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213420203035531 - 2¹¹ = 213420203033483 is a prime.

It is a super-2 number, since 2×213420203035531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213420203035231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710101517765 + 106710101517766.

It is an arithmetic number, because the mean of its divisors is an integer number (106710101517766).

Almost surely, 2^{213420203035531} is an apocalyptic number.

213420203035531 is a deficient number, since it is larger than the sum of its proper divisors (1).

213420203035531 is an equidigital number, since it uses as much as digits as its factorization.

213420203035531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 213420203035531 its reverse (135530302024312), we get a palindrome (348950505059843).

The spelling of 213420203035531 in words is "two hundred thirteen trillion, four hundred twenty billion, two hundred three million, thirty-five thousand, five hundred thirty-one".