71051157 has 6 divisors (see below), whose sum is σ = 102629462. Its totient is φ = 47367432.

The previous prime is 71051129. The next prime is 71051207. The reversal of 71051157 is 75115017.

It can be written as a sum of positive squares in only one way, i.e., 58155876 + 12895281 = 7626^2 + 3591^2 .

It is not a de Polignac number, because 71051157 - 2⁸ = 71050901 is a prime.

It is a super-2 number, since 2×71051157² = 10096533822077298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71051157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71055157) 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 5 ways as a sum of consecutive naturals, for example, 3947278 + ... + 3947295.

Almost surely, 2^71051157 is an apocalyptic number.

It is an amenable number.

71051157 is a deficient number, since it is larger than the sum of its proper divisors (31578305).

71051157 is a wasteful number, since it uses less digits than its factorization.

71051157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7894579 (or 7894576 counting only the distinct ones).

The product of its (nonzero) digits is 1225, while the sum is 27.

The square root of 71051157 is about 8429.1848360325. The cubic root of 71051157 is about 414.1812026219.

The spelling of 71051157 in words is "seventy-one million, fifty-one thousand, one hundred fifty-seven".