315135445 has 4 divisors (see below), whose sum is σ = 378162540. Its totient is φ = 252108352.

The previous prime is 315135413. The next prime is 315135473. The reversal of 315135445 is 544531513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544531513 = 173 ⋅3147581.

It can be written as a sum of positive squares in 2 ways, for example, as 33097009 + 282038436 = 5753^2 + 16794^2 .

It is a cyclic number.

It is not a de Polignac number, because 315135445 - 2⁵ = 315135413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31513540 + ... + 31513549.

It is an arithmetic number, because the mean of its divisors is an integer number (94540635).

Almost surely, 2^315135445 is an apocalyptic number.

It is an amenable number.

315135445 is a deficient number, since it is larger than the sum of its proper divisors (63027095).

315135445 is an equidigital number, since it uses as much as digits as its factorization.

315135445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63027094.

The product of its digits is 18000, while the sum is 31.

The square root of 315135445 is about 17752.0546698122. The cubic root of 315135445 is about 680.5067193414.

Adding to 315135445 its reverse (544531513), we get a palindrome (859666958).

The spelling of 315135445 in words is "three hundred fifteen million, one hundred thirty-five thousand, four hundred forty-five".