43040401 has 2 divisors, whose sum is σ = 43040402. Its totient is φ = 43040400.

The previous prime is 43040359. The next prime is 43040411. The reversal of 43040401 is 10404034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40653376 + 2387025 = 6376^2 + 1545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43040401 is a prime.

It is a super-2 number, since 2×43040401² = 3704952236481602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43040411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21520200 + 21520201.

It is an arithmetic number, because the mean of its divisors is an integer number (21520201).

Almost surely, 2^43040401 is an apocalyptic number.

It is an amenable number.

43040401 is a deficient number, since it is larger than the sum of its proper divisors (1).

43040401 is an equidigital number, since it uses as much as digits as its factorization.

43040401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 43040401 is about 6560.5183484234. The cubic root of 43040401 is about 350.4494932321.

Adding to 43040401 its reverse (10404034), we get a palindrome (53444435).

The spelling of 43040401 in words is "forty-three million, forty thousand, four hundred one".