213456433 has 2 divisors, whose sum is σ = 213456434. Its totient is φ = 213456432.

The previous prime is 213456413. The next prime is 213456457. The reversal of 213456433 is 334654312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118744609 + 94711824 = 10897^2 + 9732^2 .

It is a cyclic number.

It is not a de Polignac number, because 213456433 - 2⁵ = 213456401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213456395 and 213456404.

It is not a weakly prime, because it can be changed into another prime (213456413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106728216 + 106728217.

It is an arithmetic number, because the mean of its divisors is an integer number (106728217).

Almost surely, 2^213456433 is an apocalyptic number.

It is an amenable number.

213456433 is a deficient number, since it is larger than the sum of its proper divisors (1).

213456433 is an equidigital number, since it uses as much as digits as its factorization.

213456433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 31.

The square root of 213456433 is about 14610.1482880907. The cubic root of 213456433 is about 597.6355398236.

The spelling of 213456433 in words is "two hundred thirteen million, four hundred fifty-six thousand, four hundred thirty-three".