401403044431 has 4 divisors (see below), whose sum is σ = 401404668192. Its totient is φ = 401401420672.

The previous prime is 401403044423. The next prime is 401403044453. The reversal of 401403044431 is 134440304104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 401403044431 - 2³ = 401403044423 is a prime.

It is a super-2 number, since 2×401403044431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401403044431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401403044491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355591 + ... + 963976.

It is an arithmetic number, because the mean of its divisors is an integer number (100351167048).

Almost surely, 2^401403044431 is an apocalyptic number.

401403044431 is a deficient number, since it is larger than the sum of its proper divisors (1623761).

401403044431 is a wasteful number, since it uses less digits than its factorization.

401403044431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623760.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 401403044431 its reverse (134440304104), we get a palindrome (535843348535).

The spelling of 401403044431 in words is "four hundred one billion, four hundred three million, forty-four thousand, four hundred thirty-one".