401544413 has 4 divisors (see below), whose sum is σ = 403625148. Its totient is φ = 399463680.

The previous prime is 401544371. The next prime is 401544431. The reversal of 401544413 is 314445104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 262375204 + 139169209 = 16198^2 + 11797^2 .

It is not a de Polignac number, because 401544413 - 2⁶ = 401544349 is a prime.

It is a super-2 number, since 2×401544413² = 322475831223029138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401544113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040078 + ... + 1040463.

It is an arithmetic number, because the mean of its divisors is an integer number (100906287).

Almost surely, 2^401544413 is an apocalyptic number.

It is an amenable number.

401544413 is a deficient number, since it is larger than the sum of its proper divisors (2080735).

401544413 is a wasteful number, since it uses less digits than its factorization.

401544413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080734.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 401544413 is about 20038.5731278452. The cubic root of 401544413 is about 737.7533595854.

Adding to 401544413 its reverse (314445104), we get a palindrome (715989517).

The spelling of 401544413 in words is "four hundred one million, five hundred forty-four thousand, four hundred thirteen".