331432131 has 4 divisors (see below), whose sum is σ = 441909512. Its totient is φ = 220954752.

The previous prime is 331432121. The next prime is 331432133. The reversal of 331432131 is 131234133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131234133 = 3 ⋅43744711.

It is not a de Polignac number, because 331432131 - 2⁹ = 331431619 is a prime.

It is a super-2 number, since 2×331432131² = 219694514918402322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331432098 and 331432107.

It is not an unprimeable number, because it can be changed into a prime (331432133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55238686 + ... + 55238691.

It is an arithmetic number, because the mean of its divisors is an integer number (110477378).

Almost surely, 2^331432131 is an apocalyptic number.

331432131 is a deficient number, since it is larger than the sum of its proper divisors (110477381).

331432131 is a wasteful number, since it uses less digits than its factorization.

331432131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110477380.

The product of its digits is 648, while the sum is 21.

The square root of 331432131 is about 18205.2775589937. The cubic root of 331432131 is about 692.0405401033.

Adding to 331432131 its reverse (131234133), we get a palindrome (462666264).

The spelling of 331432131 in words is "three hundred thirty-one million, four hundred thirty-two thousand, one hundred thirty-one".