315273649 has 4 divisors (see below), whose sum is σ = 316445940. Its totient is φ = 314101360.

The previous prime is 315273599. The next prime is 315273661. The reversal of 315273649 is 946372513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946372513 = 23 ⋅41146631.

It can be written as a sum of positive squares in 2 ways, for example, as 5760000 + 309513649 = 2400^2 + 17593^2 .

It is a cyclic number.

It is not a de Polignac number, because 315273649 - 2¹⁷ = 315142577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315270649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585742 + ... + 586279.

It is an arithmetic number, because the mean of its divisors is an integer number (79111485).

Almost surely, 2^315273649 is an apocalyptic number.

It is an amenable number.

315273649 is a deficient number, since it is larger than the sum of its proper divisors (1172291).

315273649 is a wasteful number, since it uses less digits than its factorization.

315273649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172290.

The product of its digits is 136080, while the sum is 40.

The square root of 315273649 is about 17755.9468629527. The cubic root of 315273649 is about 680.6061845152.

The spelling of 315273649 in words is "three hundred fifteen million, two hundred seventy-three thousand, six hundred forty-nine".