315521461 has 4 divisors (see below), whose sum is σ = 315600300. Its totient is φ = 315442624.

The previous prime is 315521443. The next prime is 315521473. The reversal of 315521461 is 164125513.

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 310816900 + 4704561 = 17630^2 + 2169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315521461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315521161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33076 + ... + 41533.

It is an arithmetic number, because the mean of its divisors is an integer number (78900075).

Almost surely, 2^315521461 is an apocalyptic number.

It is an amenable number.

315521461 is a deficient number, since it is larger than the sum of its proper divisors (78839).

315521461 is an equidigital number, since it uses as much as digits as its factorization.

315521461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78838.

The product of its digits is 3600, while the sum is 28.

The square root of 315521461 is about 17762.9237739737. The cubic root of 315521461 is about 680.7844616076.

Adding to 315521461 its reverse (164125513), we get a palindrome (479646974).

The spelling of 315521461 in words is "three hundred fifteen million, five hundred twenty-one thousand, four hundred sixty-one".