315532240 has 80 divisors (see below), whose sum is σ = 817715520. Its totient is φ = 112527360.

The previous prime is 315532213. The next prime is 315532247. The reversal of 315532240 is 42235513.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315532247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19735 + ... + 31945.

It is an arithmetic number, because the mean of its divisors is an integer number (10221444).

Almost surely, 2^315532240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315532240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408857760).

315532240 is an abundant number, since it is smaller than the sum of its proper divisors (502183280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315532240 is a wasteful number, since it uses less digits than its factorization.

315532240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12260 (or 12254 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 315532240 is about 17763.2271842703. The cubic root of 315532240 is about 680.7922139510.

Adding to 315532240 its reverse (42235513), we get a palindrome (357767753).

The spelling of 315532240 in words is "three hundred fifteen million, five hundred thirty-two thousand, two hundred forty".