315421040 has 80 divisors (see below), whose sum is σ = 804055680. Its totient is φ = 114120960.

The previous prime is 315421019. The next prime is 315421069. The reversal of 315421040 is 40124513.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198971 + ... + 200549.

It is an arithmetic number, because the mean of its divisors is an integer number (10050696).

Almost surely, 2^315421040 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 315421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402027840).

315421040 is an abundant number, since it is smaller than the sum of its proper divisors (488634640).

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

315421040 is a wasteful number, since it uses less digits than its factorization.

315421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830 (or 1824 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 315421040 is about 17760.0968465828. The cubic root of 315421040 is about 680.7122295315.

Adding to 315421040 its reverse (40124513), we get a palindrome (355545553).

The spelling of 315421040 in words is "three hundred fifteen million, four hundred twenty-one thousand, forty".