71563336 has 48 divisors (see below), whose sum is σ = 153567540. Its totient is φ = 31073280.

The previous prime is 71563333. The next prime is 71563343. The reversal of 71563336 is 63336517.

It can be written as a sum of positive squares in 6 ways, for example, as 16892100 + 54671236 = 4110^2 + 7394^2 .

It is a super-2 number, since 2×71563336² = 10242622118897792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (71563333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28866 + ... + 31246.

Almost surely, 2^71563336 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 71563336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76783770).

71563336 is an abundant number, since it is smaller than the sum of its proper divisors (82004204).

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

71563336 is a wasteful number, since it uses less digits than its factorization.

71563336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434 (or 2413 counting only the distinct ones).

The product of its digits is 34020, while the sum is 34.

The square root of 71563336 is about 8459.5115698248. The cubic root of 71563336 is about 415.1740422563.

The spelling of 71563336 in words is "seventy-one million, five hundred sixty-three thousand, three hundred thirty-six".