331444444157 has 2 divisors, whose sum is σ = 331444444158. Its totient is φ = 331444444156.

The previous prime is 331444444087. The next prime is 331444444181. The reversal of 331444444157 is 751444444133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292276471876 + 39167972281 = 540626^2 + 197909^2 .

It is a cyclic number.

It is not a de Polignac number, because 331444444157 - 2¹⁶ = 331444378621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331444444057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165722222078 + 165722222079.

It is an arithmetic number, because the mean of its divisors is an integer number (165722222079).

Almost surely, 2^331444444157 is an apocalyptic number.

It is an amenable number.

331444444157 is a deficient number, since it is larger than the sum of its proper divisors (1).

331444444157 is an equidigital number, since it uses as much as digits as its factorization.

331444444157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 44.

The spelling of 331444444157 in words is "three hundred thirty-one billion, four hundred forty-four million, four hundred forty-four thousand, one hundred fifty-seven".