213742433 has 2 divisors, whose sum is σ = 213742434. Its totient is φ = 213742432.

The previous prime is 213742429. The next prime is 213742483. The reversal of 213742433 is 334247312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108638929 + 105103504 = 10423^2 + 10252^2 .

It is a cyclic number.

It is not a de Polignac number, because 213742433 - 2² = 213742429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213742396 and 213742405.

It is not a weakly prime, because it can be changed into another prime (213742423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106871216 + 106871217.

It is an arithmetic number, because the mean of its divisors is an integer number (106871217).

Almost surely, 2^213742433 is an apocalyptic number.

It is an amenable number.

213742433 is a deficient number, since it is larger than the sum of its proper divisors (1).

213742433 is an equidigital number, since it uses as much as digits as its factorization.

213742433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 29.

The square root of 213742433 is about 14619.9327289834. The cubic root of 213742433 is about 597.9023350680.

Adding to 213742433 its reverse (334247312), we get a palindrome (547989745).

The spelling of 213742433 in words is "two hundred thirteen million, seven hundred forty-two thousand, four hundred thirty-three".