315721484 has 96 divisors (see below), whose sum is σ = 668570112. Its totient is φ = 129024000.

The previous prime is 315721457. The next prime is 315721493. The reversal of 315721484 is 484127513.

315721484 is nontrivially palindromic in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1123424 + ... + 1123704.

It is an arithmetic number, because the mean of its divisors is an integer number (6964272).

Almost surely, 2^315721484 is an apocalyptic number.

315721484 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

315721484 is an abundant number, since it is smaller than the sum of its proper divisors (352848628).

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

315721484 is a wasteful number, since it uses less digits than its factorization.

315721484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 385 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 315721484 is about 17768.5532331701. The cubic root of 315721484 is about 680.9282910054.

Adding to 315721484 its reverse (484127513), we get a palindrome (799848997).

The spelling of 315721484 in words is "three hundred fifteen million, seven hundred twenty-one thousand, four hundred eighty-four".