213400673533 has 2 divisors, whose sum is σ = 213400673534. Its totient is φ = 213400673532.

The previous prime is 213400673531. The next prime is 213400673567. The reversal of 213400673533 is 335376004312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121049718084 + 92350955449 = 347922^2 + 303893^2 .

It is a cyclic number.

It is not a de Polignac number, because 213400673533 - 2¹ = 213400673531 is a prime.

Together with 213400673531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 213400673492 and 213400673501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213400673531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106700336766 + 106700336767.

It is an arithmetic number, because the mean of its divisors is an integer number (106700336767).

Almost surely, 2^213400673533 is an apocalyptic number.

It is an amenable number.

213400673533 is a deficient number, since it is larger than the sum of its proper divisors (1).

213400673533 is an equidigital number, since it uses as much as digits as its factorization.

213400673533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 37.

Adding to 213400673533 its reverse (335376004312), we get a palindrome (548776677845).

The spelling of 213400673533 in words is "two hundred thirteen billion, four hundred million, six hundred seventy-three thousand, five hundred thirty-three".