71648031 has 48 divisors (see below), whose sum is σ = 124260864. Its totient is φ = 35754048.

The previous prime is 71648029. The next prime is 71648051. The reversal of 71648031 is 13084617.

It is a happy number.

It is not a de Polignac number, because 71648031 - 2¹ = 71648029 is a prime.

It is a super-2 number, since 2×71648031² = 10266880692353922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71648031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71648051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98190 + ... + 98916.

It is an arithmetic number, because the mean of its divisors is an integer number (2588768).

Almost surely, 2^71648031 is an apocalyptic number.

71648031 is a deficient number, since it is larger than the sum of its proper divisors (52612833).

71648031 is a wasteful number, since it uses less digits than its factorization.

71648031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 71648031 is about 8464.5159932509. The cubic root of 71648031 is about 415.3377634426.

The spelling of 71648031 in words is "seventy-one million, six hundred forty-eight thousand, thirty-one".