331204012157 has 2 divisors, whose sum is σ = 331204012158. Its totient is φ = 331204012156.

The previous prime is 331204012127. The next prime is 331204012163. The reversal of 331204012157 is 751210402133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272579012281 + 58624999876 = 522091^2 + 242126^2 .

It is an emirp because it is prime and its reverse (751210402133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331204012157 - 2²⁴ = 331187234941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331204012127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165602006078 + 165602006079.

It is an arithmetic number, because the mean of its divisors is an integer number (165602006079).

Almost surely, 2^331204012157 is an apocalyptic number.

It is an amenable number.

331204012157 is a deficient number, since it is larger than the sum of its proper divisors (1).

331204012157 is an equidigital number, since it uses as much as digits as its factorization.

331204012157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 331204012157 in words is "three hundred thirty-one billion, two hundred four million, twelve thousand, one hundred fifty-seven".