315240051 has 8 divisors (see below), whose sum is σ = 480365824. Its totient is φ = 180137160.

The previous prime is 315240043. The next prime is 315240053. The reversal of 315240051 is 150042513.

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

It is not a de Polignac number, because 315240051 - 2³ = 315240043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 15011431 = 315240051 / (3 + 1 + 5 + 2 + 4 + 0 + 0 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315240053) 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, 7505695 + ... + 7505736.

It is an arithmetic number, because the mean of its divisors is an integer number (60045728).

Almost surely, 2^315240051 is an apocalyptic number.

315240051 is a deficient number, since it is larger than the sum of its proper divisors (165125773).

315240051 is a wasteful number, since it uses less digits than its factorization.

315240051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15011441.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 315240051 is about 17755.0007321881. Note that the first 3 decimals coincide. The cubic root of 315240051 is about 680.5820067689.

Adding to 315240051 its reverse (150042513), we get a palindrome (465282564).

The spelling of 315240051 in words is "three hundred fifteen million, two hundred forty thousand, fifty-one".