71531363 has 4 divisors (see below), whose sum is σ = 71784408. Its totient is φ = 71278320.

The previous prime is 71531303. The next prime is 71531377. The reversal of 71531363 is 36313517.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71531363 - 2⁸ = 71531107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71531303) 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, 126098 + ... + 126663.

It is an arithmetic number, because the mean of its divisors is an integer number (17946102).

Almost surely, 2^71531363 is an apocalyptic number.

71531363 is a deficient number, since it is larger than the sum of its proper divisors (253045).

71531363 is a wasteful number, since it uses less digits than its factorization.

71531363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253044.

The product of its digits is 5670, while the sum is 29.

The square root of 71531363 is about 8457.6215923864. The cubic root of 71531363 is about 415.1122026898.

The spelling of 71531363 in words is "seventy-one million, five hundred thirty-one thousand, three hundred sixty-three".