331030421 has 16 divisors (see below), whose sum is σ = 353310336. Its totient is φ = 309456576.

The previous prime is 331030397. The next prime is 331030423. The reversal of 331030421 is 124030133.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331030421 is a prime.

It is a super-2 number, since 2×331030421² = 219162279254874482, which 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 331030421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331030423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539711 + ... + 540323.

It is an arithmetic number, because the mean of its divisors is an integer number (22081896).

Almost surely, 2^331030421 is an apocalyptic number.

It is an amenable number.

331030421 is a deficient number, since it is larger than the sum of its proper divisors (22279915).

331030421 is a wasteful number, since it uses less digits than its factorization.

331030421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331030421 is about 18194.2414241430. The cubic root of 331030421 is about 691.7608327657.

Adding to 331030421 its reverse (124030133), we get a palindrome (455060554).

The spelling of 331030421 in words is "three hundred thirty-one million, thirty thousand, four hundred twenty-one".