331421131 has 2 divisors, whose sum is σ = 331421132. Its totient is φ = 331421130.

The previous prime is 331421119. The next prime is 331421159. The reversal of 331421131 is 131124133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331421131 - 2⁷ = 331421003 is a prime.

It is a super-2 number, since 2×331421131² = 219679932146638322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331421099 and 331421108.

It is not a weakly prime, because it can be changed into another prime (331431131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165710565 + 165710566.

It is an arithmetic number, because the mean of its divisors is an integer number (165710566).

Almost surely, 2^331421131 is an apocalyptic number.

331421131 is a deficient number, since it is larger than the sum of its proper divisors (1).

331421131 is an equidigital number, since it uses as much as digits as its factorization.

331421131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 331421131 is about 18204.9754462894. The cubic root of 331421131 is about 692.0328839052.

Adding to 331421131 its reverse (131124133), we get a palindrome (462545264).

The spelling of 331421131 in words is "three hundred thirty-one million, four hundred twenty-one thousand, one hundred thirty-one".