331421351 has 4 divisors (see below), whose sum is σ = 348864600. Its totient is φ = 313978104.

The previous prime is 331421303. The next prime is 331421371. The reversal of 331421351 is 153124133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153124133 = 23 ⋅6657571.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331421351 is a prime.

It is a super-2 number, since 2×331421351² = 219680223797330402, 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 (331421371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8721596 + ... + 8721633.

It is an arithmetic number, because the mean of its divisors is an integer number (87216150).

Almost surely, 2^331421351 is an apocalyptic number.

331421351 is a deficient number, since it is larger than the sum of its proper divisors (17443249).

331421351 is a wasteful number, since it uses less digits than its factorization.

331421351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17443248.

The product of its digits is 1080, while the sum is 23.

The square root of 331421351 is about 18204.9814885926. The cubic root of 331421351 is about 692.0330370308.

Adding to 331421351 its reverse (153124133), we get a palindrome (484545484).

The spelling of 331421351 in words is "three hundred thirty-one million, four hundred twenty-one thousand, three hundred fifty-one".