315541421 has 6 divisors (see below), whose sum is σ = 341681130. Its totient is φ = 291268848.

The previous prime is 315541399. The next prime is 315541433. The reversal of 315541421 is 124145513.

It can be written as a sum of positive squares in 3 ways, for example, as 1755625 + 313785796 = 1325^2 + 17714^2 .

It is a de Polignac number, because none of the positive numbers 2^k-315541421 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 (315541451) 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 5 ways as a sum of consecutive naturals, for example, 933386 + ... + 933723.

It is an arithmetic number, because the mean of its divisors is an integer number (56946855).

Almost surely, 2^315541421 is an apocalyptic number.

It is an amenable number.

315541421 is a deficient number, since it is larger than the sum of its proper divisors (26139709).

315541421 is a wasteful number, since it uses less digits than its factorization.

315541421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867135 (or 1867122 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 315541421 is about 17763.4856095306. The cubic root of 315541421 is about 680.7988168607.

Adding to 315541421 its reverse (124145513), we get a palindrome (439686934).

The spelling of 315541421 in words is "three hundred fifteen million, five hundred forty-one thousand, four hundred twenty-one".