213233542993 has 2 divisors, whose sum is σ = 213233542994. Its totient is φ = 213233542992.

The previous prime is 213233542987. The next prime is 213233543027. The reversal of 213233542993 is 399245332312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143419749264 + 69813793729 = 378708^2 + 264223^2 .

It is a cyclic number.

It is not a de Polignac number, because 213233542993 - 2²¹ = 213231445841 is a prime.

It is not a weakly prime, because it can be changed into another prime (213233542913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106616771496 + 106616771497.

It is an arithmetic number, because the mean of its divisors is an integer number (106616771497).

Almost surely, 2^213233542993 is an apocalyptic number.

It is an amenable number.

213233542993 is a deficient number, since it is larger than the sum of its proper divisors (1).

213233542993 is an equidigital number, since it uses as much as digits as its factorization.

213233542993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 46.

The spelling of 213233542993 in words is "two hundred thirteen billion, two hundred thirty-three million, five hundred forty-two thousand, nine hundred ninety-three".