331431421 has 8 divisors (see below), whose sum is σ = 350650080. Its totient is φ = 312390288.

The previous prime is 331431409. The next prime is 331431427. The reversal of 331431421 is 124134133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331431421 - 2¹³ = 331423229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331431392 and 331431401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331431427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40531 + ... + 48016.

It is an arithmetic number, because the mean of its divisors is an integer number (43831260).

Almost surely, 2^331431421 is an apocalyptic number.

It is an amenable number.

331431421 is a deficient number, since it is larger than the sum of its proper divisors (19218659).

331431421 is a wasteful number, since it uses less digits than its factorization.

331431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88763.

The product of its digits is 864, while the sum is 22.

The square root of 331431421 is about 18205.2580591432. The cubic root of 331431421 is about 692.0400459356.

Adding to 331431421 its reverse (124134133), we get a palindrome (455565554).

The spelling of 331431421 in words is "three hundred thirty-one million, four hundred thirty-one thousand, four hundred twenty-one".