315355261 has 4 divisors (see below), whose sum is σ = 339613372. Its totient is φ = 291097152.

The previous prime is 315355259. The next prime is 315355267. The reversal of 315355261 is 162553513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162553513 = 2441 ⋅66593.

It can be written as a sum of positive squares in 2 ways, for example, as 211702500 + 103652761 = 14550^2 + 10181^2 .

It is a cyclic number.

It is not a de Polignac number, because 315355261 - 2¹ = 315355259 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 (315355267) 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 3 ways as a sum of consecutive naturals, for example, 12129036 + ... + 12129061.

It is an arithmetic number, because the mean of its divisors is an integer number (84903343).

Almost surely, 2^315355261 is an apocalyptic number.

It is an amenable number.

315355261 is a deficient number, since it is larger than the sum of its proper divisors (24258111).

315355261 is a wasteful number, since it uses less digits than its factorization.

315355261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24258110.

The product of its digits is 13500, while the sum is 31.

The square root of 315355261 is about 17758.2448738607. The cubic root of 315355261 is about 680.6649068769.

The spelling of 315355261 in words is "three hundred fifteen million, three hundred fifty-five thousand, two hundred sixty-one".