315221231447 has 2 divisors, whose sum is σ = 315221231448. Its totient is φ = 315221231446.

The previous prime is 315221231411. The next prime is 315221231503. The reversal of 315221231447 is 744132122513.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315221231447 - 2⁶ = 315221231383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315221231407) 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, 157610615723 + 157610615724.

It is an arithmetic number, because the mean of its divisors is an integer number (157610615724).

Almost surely, 2^315221231447 is an apocalyptic number.

315221231447 is a deficient number, since it is larger than the sum of its proper divisors (1).

315221231447 is an equidigital number, since it uses as much as digits as its factorization.

315221231447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The spelling of 315221231447 in words is "three hundred fifteen billion, two hundred twenty-one million, two hundred thirty-one thousand, four hundred forty-seven".