71132931 has 16 divisors (see below), whose sum is σ = 105539200. Its totient is φ = 47351304.

The previous prime is 71132927. The next prime is 71132939. The reversal of 71132931 is 13923117.

It is not a de Polignac number, because 71132931 - 2² = 71132927 is a prime.

It is a super-2 number, since 2×71132931² = 10119787745301522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71132895 and 71132904.

It is not an unprimeable number, because it can be changed into a prime (71132939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21660 + ... + 24726.

It is an arithmetic number, because the mean of its divisors is an integer number (6596200).

Almost surely, 2^71132931 is an apocalyptic number.

71132931 is a deficient number, since it is larger than the sum of its proper divisors (34406269).

71132931 is a wasteful number, since it uses less digits than its factorization.

71132931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935 (or 3929 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 71132931 is about 8434.0340881455. The cubic root of 71132931 is about 414.3400377947.

The spelling of 71132931 in words is "seventy-one million, one hundred thirty-two thousand, nine hundred thirty-one".