331538227 has 2 divisors, whose sum is σ = 331538228. Its totient is φ = 331538226.

The previous prime is 331538191. The next prime is 331538231. The reversal of 331538227 is 722835133.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331538227 is a prime.

It is a super-3 number, since 3×331538227³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331538192 and 331538201.

It is not a weakly prime, because it can be changed into another prime (331538297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165769113 + 165769114.

It is an arithmetic number, because the mean of its divisors is an integer number (165769114).

Almost surely, 2^331538227 is an apocalyptic number.

331538227 is a deficient number, since it is larger than the sum of its proper divisors (1).

331538227 is an equidigital number, since it uses as much as digits as its factorization.

331538227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 331538227 is about 18208.1912061577. The cubic root of 331538227 is about 692.1143761350.

The spelling of 331538227 in words is "three hundred thirty-one million, five hundred thirty-eight thousand, two hundred twenty-seven".