315540133 has 4 divisors (see below), whose sum is σ = 315681228. Its totient is φ = 315399040.

The previous prime is 315540119. The next prime is 315540143. The reversal of 315540133 is 331045513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159340129 + 156200004 = 12623^2 + 12498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315540133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315540098 and 315540107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315540143) 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, 67138 + ... + 71683.

It is an arithmetic number, because the mean of its divisors is an integer number (78920307).

Almost surely, 2^315540133 is an apocalyptic number.

It is an amenable number.

315540133 is a deficient number, since it is larger than the sum of its proper divisors (141095).

315540133 is a wasteful number, since it uses less digits than its factorization.

315540133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141094.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 315540133 is about 17763.4493553476. The cubic root of 315540133 is about 680.7978905480.

Adding to 315540133 its reverse (331045513), we get a palindrome (646585646).

The spelling of 315540133 in words is "three hundred fifteen million, five hundred forty thousand, one hundred thirty-three".