315044021 has 8 divisors (see below), whose sum is σ = 319382400. Its totient is φ = 310714560.

The previous prime is 315043991. The next prime is 315044029. The reversal of 315044021 is 120440513.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315044021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315043984 and 315044002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315044029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100445 + ... + 103533.

It is an arithmetic number, because the mean of its divisors is an integer number (39922800).

Almost surely, 2^315044021 is an apocalyptic number.

It is an amenable number.

315044021 is a deficient number, since it is larger than the sum of its proper divisors (4338379).

315044021 is a wasteful number, since it uses less digits than its factorization.

315044021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4459.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 315044021 is about 17749.4794571559. The cubic root of 315044021 is about 680.4409056681.

Adding to 315044021 its reverse (120440513), we get a palindrome (435484534).

The spelling of 315044021 in words is "three hundred fifteen million, forty-four thousand, twenty-one".