315561005 has 8 divisors (see below), whose sum is σ = 381438072. Its totient is φ = 250605568.

The previous prime is 315560963. The next prime is 315561013. The reversal of 315561005 is 500165513.

It can be written as a sum of positive squares in 4 ways, for example, as 109035364 + 206525641 = 10442^2 + 14371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315561005 - 2¹² = 315556909 is a prime.

It is a super-2 number, since 2×315561005² = 199157495753220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229652 + ... + 231021.

It is an arithmetic number, because the mean of its divisors is an integer number (47679759).

Almost surely, 2^315561005 is an apocalyptic number.

It is an amenable number.

315561005 is a deficient number, since it is larger than the sum of its proper divisors (65877067).

315561005 is a wasteful number, since it uses less digits than its factorization.

315561005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460815.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 315561005 is about 17764.0368441410. The cubic root of 315561005 is about 680.8129011059.

The spelling of 315561005 in words is "three hundred fifteen million, five hundred sixty-one thousand, five".