315514321 has 4 divisors (see below), whose sum is σ = 316081332. Its totient is φ = 314947312.

The previous prime is 315514307. The next prime is 315514363. The reversal of 315514321 is 123415513.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24641296 + 290873025 = 4964^2 + 17055^2 .

It is a cyclic number.

It is not a de Polignac number, because 315514321 - 2¹⁵ = 315481553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315514421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282670 + ... + 283783.

It is an arithmetic number, because the mean of its divisors is an integer number (79020333).

Almost surely, 2^315514321 is an apocalyptic number.

It is an amenable number.

315514321 is a deficient number, since it is larger than the sum of its proper divisors (567011).

315514321 is an equidigital number, since it uses as much as digits as its factorization.

315514321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567010.

The product of its digits is 1800, while the sum is 25.

The square root of 315514321 is about 17762.7227924100. The cubic root of 315514321 is about 680.7793263650.

Adding to 315514321 its reverse (123415513), we get a palindrome (438929834).

The spelling of 315514321 in words is "three hundred fifteen million, five hundred fourteen thousand, three hundred twenty-one".