315021450 has 96 divisors (see below), whose sum is σ = 807573312. Its totient is φ = 81216000.

The previous prime is 315021449. The next prime is 315021479. The reversal of 315021450 is 54120513.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1113009 + ... + 1113291.

It is an arithmetic number, because the mean of its divisors is an integer number (8412222).

Almost surely, 2^315021450 is an apocalyptic number.

315021450 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 315021450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403786656).

315021450 is an abundant number, since it is smaller than the sum of its proper divisors (492551862).

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

315021450 is a wasteful number, since it uses less digits than its factorization.

315021450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 315021450 is about 17748.8436243041. The cubic root of 315021450 is about 680.4246554539.

Adding to 315021450 its reverse (54120513), we get a palindrome (369141963).

The spelling of 315021450 in words is "three hundred fifteen million, twenty-one thousand, four hundred fifty".