315054881 has 2 divisors, whose sum is σ = 315054882. Its totient is φ = 315054880.

The previous prime is 315054877. The next prime is 315054893. The reversal of 315054881 is 188450513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187251856 + 127803025 = 13684^2 + 11305^2 .

It is an emirp because it is prime and its reverse (188450513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315054881 - 2² = 315054877 is a prime.

It is a super-2 number, since 2×315054881² = 198519156083848322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315054841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157527440 + 157527441.

It is an arithmetic number, because the mean of its divisors is an integer number (157527441).

Almost surely, 2^315054881 is an apocalyptic number.

It is an amenable number.

315054881 is a deficient number, since it is larger than the sum of its proper divisors (1).

315054881 is an equidigital number, since it uses as much as digits as its factorization.

315054881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 315054881 is about 17749.7853789842. The cubic root of 315054881 is about 680.4487241557.

The spelling of 315054881 in words is "three hundred fifteen million, fifty-four thousand, eight hundred eighty-one".