213434401 has 2 divisors, whose sum is σ = 213434402. Its totient is φ = 213434400.

The previous prime is 213434399. The next prime is 213434471. The reversal of 213434401 is 104434312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177422400 + 36012001 = 13320^2 + 6001^2 .

It is a cyclic number.

It is not a de Polignac number, because 213434401 - 2¹ = 213434399 is a prime.

Together with 213434399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (213434471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106717200 + 106717201.

It is an arithmetic number, because the mean of its divisors is an integer number (106717201).

Almost surely, 2^213434401 is an apocalyptic number.

It is an amenable number.

213434401 is a deficient number, since it is larger than the sum of its proper divisors (1).

213434401 is an equidigital number, since it uses as much as digits as its factorization.

213434401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 213434401 is about 14609.3942721798. The cubic root of 213434401 is about 597.6149773774.

Adding to 213434401 its reverse (104434312), we get a palindrome (317868713).

The spelling of 213434401 in words is "two hundred thirteen million, four hundred thirty-four thousand, four hundred one".