331400421 has 24 divisors (see below), whose sum is σ = 525152160. Its totient is φ = 199716000.

The previous prime is 331400393. The next prime is 331400473. The reversal of 331400421 is 124004133.

It is not a de Polignac number, because 331400421 - 2⁹ = 331399909 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331400394 and 331400403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331400521) 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 23 ways as a sum of consecutive naturals, for example, 8371 + ... + 27071.

It is an arithmetic number, because the mean of its divisors is an integer number (21881340).

Almost surely, 2^331400421 is an apocalyptic number.

It is an amenable number.

331400421 is a deficient number, since it is larger than the sum of its proper divisors (193751739).

331400421 is a wasteful number, since it uses less digits than its factorization.

331400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18897 (or 18894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 331400421 is about 18204.4066368558. The cubic root of 331400421 is about 692.0184689124.

Adding to 331400421 its reverse (124004133), we get a palindrome (455404554).

It can be divided in two parts, 3314004 and 21, that added together give a triangular number (3314025 = T₂₅₇₄).

The spelling of 331400421 in words is "three hundred thirty-one million, four hundred thousand, four hundred twenty-one".