448381513 has 4 divisors (see below), whose sum is σ = 471980560. Its totient is φ = 424782468.

The previous prime is 448381471. The next prime is 448381529. The reversal of 448381513 is 315183844.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-448381513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448381013) 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, 11799495 + ... + 11799532.

It is an arithmetic number, because the mean of its divisors is an integer number (117995140).

Almost surely, 2^448381513 is an apocalyptic number.

It is an amenable number.

448381513 is a deficient number, since it is larger than the sum of its proper divisors (23599047).

448381513 is a wasteful number, since it uses less digits than its factorization.

448381513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23599046.

The product of its digits is 46080, while the sum is 37.

The square root of 448381513 is about 21175.0209681124. The cubic root of 448381513 is about 765.3896162775.

The spelling of 448381513 in words is "four hundred forty-eight million, three hundred eighty-one thousand, five hundred thirteen".