71131012 has 6 divisors (see below), whose sum is σ = 124479278. Its totient is φ = 35565504.

The previous prime is 71131001. The next prime is 71131031. The reversal of 71131012 is 21013117.

It can be written as a sum of positive squares in only one way, i.e., 61246276 + 9884736 = 7826^2 + 3144^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8891373 + ... + 8891380.

Almost surely, 2^71131012 is an apocalyptic number.

It is an amenable number.

71131012 is a deficient number, since it is larger than the sum of its proper divisors (53348266).

71131012 is a wasteful number, since it uses less digits than its factorization.

71131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17782757 (or 17782755 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 71131012 is about 8433.9203221278. The cubic root of 71131012 is about 414.3363117863.

Adding to 71131012 its reverse (21013117), we get a palindrome (92144129).

The spelling of 71131012 in words is "seventy-one million, one hundred thirty-one thousand, twelve".