401443513 has 2 divisors, whose sum is σ = 401443514. Its totient is φ = 401443512.

The previous prime is 401443447. The next prime is 401443517. The reversal of 401443513 is 315344104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388996729 + 12446784 = 19723^2 + 3528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401443513 is a prime.

It is a super-2 number, since 2×401443513² = 322313788259562338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401443517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200721756 + 200721757.

It is an arithmetic number, because the mean of its divisors is an integer number (200721757).

Almost surely, 2^401443513 is an apocalyptic number.

It is an amenable number.

401443513 is a deficient number, since it is larger than the sum of its proper divisors (1).

401443513 is an equidigital number, since it uses as much as digits as its factorization.

401443513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 401443513 is about 20036.0553253379. The cubic root of 401443513 is about 737.6915602364.

Adding to 401443513 its reverse (315344104), we get a palindrome (716787617).

It can be divided in two parts, 401443 and 513, that added together give a square (401956 = 634²).

The spelling of 401443513 in words is "four hundred one million, four hundred forty-three thousand, five hundred thirteen".