71231648 has 24 divisors (see below), whose sum is σ = 142163028. Its totient is φ = 35126784.

The previous prime is 71231639. The next prime is 71231663. The reversal of 71231648 is 84613217.

It can be written as a sum of positive squares in 2 ways, for example, as 67436944 + 3794704 = 8212^2 + 1948^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12911 + ... + 17582.

Almost surely, 2^71231648 is an apocalyptic number.

It is an amenable number.

71231648 is a deficient number, since it is larger than the sum of its proper divisors (70931380).

71231648 is a wasteful number, since it uses less digits than its factorization.

71231648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30576 (or 30568 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 71231648 is about 8439.8843593973. The cubic root of 71231648 is about 414.5316204100.

The spelling of 71231648 in words is "seventy-one million, two hundred thirty-one thousand, six hundred forty-eight".