315213390 has 128 divisors (see below), whose sum is σ = 885012480. Its totient is φ = 79681536.

The previous prime is 315213377. The next prime is 315213391. The reversal of 315213390 is 93312513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315213391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1198399 + ... + 1198661.

It is an arithmetic number, because the mean of its divisors is an integer number (6914160).

Almost surely, 2^315213390 is an apocalyptic number.

315213390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 315213390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442506240).

315213390 is an abundant number, since it is smaller than the sum of its proper divisors (569799090).

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

315213390 is a wasteful number, since it uses less digits than its factorization.

315213390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 315213390 is about 17754.2499137530. The cubic root of 315213390 is about 680.5628197944.

The spelling of 315213390 in words is "three hundred fifteen million, two hundred thirteen thousand, three hundred ninety".