201344405 has 4 divisors (see below), whose sum is σ = 241613292. Its totient is φ = 161075520.

The previous prime is 201344401. The next prime is 201344431. The reversal of 201344405 is 504443102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504443102 = 2 ⋅252221551.

It can be written as a sum of positive squares in 2 ways, for example, as 119224561 + 82119844 = 10919^2 + 9062^2 .

It is not a de Polignac number, because 201344405 - 2² = 201344401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201344401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20134436 + ... + 20134445.

It is an arithmetic number, because the mean of its divisors is an integer number (60403323).

Almost surely, 2^201344405 is an apocalyptic number.

It is an amenable number.

201344405 is a deficient number, since it is larger than the sum of its proper divisors (40268887).

201344405 is an equidigital number, since it uses as much as digits as its factorization.

201344405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40268886.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 201344405 is about 14189.5879080402. The cubic root of 201344405 is about 586.1109771685.

Adding to 201344405 its reverse (504443102), we get a palindrome (705787507).

The spelling of 201344405 in words is "two hundred one million, three hundred forty-four thousand, four hundred five".