71431504 has 10 divisors (see below), whose sum is σ = 138398570. Its totient is φ = 35715744.

The previous prime is 71431499. The next prime is 71431511. The reversal of 71431504 is 40513417.

It can be written as a sum of positive squares in only one way, i.e., 69689104 + 1742400 = 8348^2 + 1320^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2232219 + ... + 2232250.

It is an arithmetic number, because the mean of its divisors is an integer number (13839857).

Almost surely, 2^71431504 is an apocalyptic number.

It is an amenable number.

71431504 is a deficient number, since it is larger than the sum of its proper divisors (66967066).

71431504 is a wasteful number, since it uses less digits than its factorization.

71431504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464477 (or 4464471 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 71431504 is about 8451.7160387699. The cubic root of 71431504 is about 414.9189448318.

The spelling of 71431504 in words is "seventy-one million, four hundred thirty-one thousand, five hundred four".