203423213401 has 2 divisors, whose sum is σ = 203423213402. Its totient is φ = 203423213400.

The previous prime is 203423213393. The next prime is 203423213429. The reversal of 203423213401 is 104312324302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163373598025 + 40049615376 = 404195^2 + 200124^2 .

It is a cyclic number.

It is not a de Polignac number, because 203423213401 - 2³ = 203423213393 is a prime.

It is not a weakly prime, because it can be changed into another prime (203423213471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101711606700 + 101711606701.

It is an arithmetic number, because the mean of its divisors is an integer number (101711606701).

Almost surely, 2^203423213401 is an apocalyptic number.

It is an amenable number.

203423213401 is a deficient number, since it is larger than the sum of its proper divisors (1).

203423213401 is an equidigital number, since it uses as much as digits as its factorization.

203423213401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 203423213401 its reverse (104312324302), we get a palindrome (307735537703).

The spelling of 203423213401 in words is "two hundred three billion, four hundred twenty-three million, two hundred thirteen thousand, four hundred one".