315220 has 12 divisors (see below), whose sum is σ = 662004. Its totient is φ = 126080.

The previous prime is 315199. The next prime is 315223. The reversal of 315220 is 22513.

315220 = T₃₉₅ + T₃₉₆ + ... + T₃₉₈.

It can be written as a sum of positive squares in 2 ways, for example, as 156816 + 158404 = 396^2 + 398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 315220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315223) 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, 7861 + ... + 7900.

It is an arithmetic number, because the mean of its divisors is an integer number (55167).

2³¹⁵²²⁰ is an apocalyptic number.

It is an amenable number.

315220 is an abundant number, since it is smaller than the sum of its proper divisors (346784).

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

315220 is a wasteful number, since it uses less digits than its factorization.

315220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15770 (or 15768 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 315220 is about 561.4445653847. Note that the first 3 decimals coincide. The cubic root of 315220 is about 68.0567576877.

Adding to 315220 its reverse (22513), we get a palindrome (337733).

It can be divided in two parts, 315 and 220, that added together give a palindrome (535).

The spelling of 315220 in words is "three hundred fifteen thousand, two hundred twenty".