331403431 has 4 divisors (see below), whose sum is σ = 331516864. Its totient is φ = 331290000.

The previous prime is 331403419. The next prime is 331403437. The reversal of 331403431 is 134304133.

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 331403431 - 2⁵ = 331403399 is a prime.

It is a super-2 number, since 2×331403431² = 219656468157143522, 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 (331403437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52215 + ... + 58216.

It is an arithmetic number, because the mean of its divisors is an integer number (82879216).

Almost surely, 2^331403431 is an apocalyptic number.

331403431 is a deficient number, since it is larger than the sum of its proper divisors (113433).

331403431 is a wasteful number, since it uses less digits than its factorization.

331403431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113432.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 331403431 is about 18204.4893089589. The cubic root of 331403431 is about 692.0205640308.

Adding to 331403431 its reverse (134304133), we get a palindrome (465707564).

The spelling of 331403431 in words is "three hundred thirty-one million, four hundred three thousand, four hundred thirty-one".