315054221 has 2 divisors, whose sum is σ = 315054222. Its totient is φ = 315054220.

The previous prime is 315054199. The next prime is 315054227. The reversal of 315054221 is 122450513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305200900 + 9853321 = 17470^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 315054221 - 2¹⁴ = 315037837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315054227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157527110 + 157527111.

It is an arithmetic number, because the mean of its divisors is an integer number (157527111).

Almost surely, 2^315054221 is an apocalyptic number.

It is an amenable number.

315054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

315054221 is an equidigital number, since it uses as much as digits as its factorization.

315054221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 315054221 is about 17749.7667872003. The cubic root of 315054221 is about 680.4482490041.

The spelling of 315054221 in words is "three hundred fifteen million, fifty-four thousand, two hundred twenty-one".