71057086 has 4 divisors (see below), whose sum is σ = 106585632. Its totient is φ = 35528542.

The previous prime is 71057083. The next prime is 71057087. The reversal of 71057086 is 68075017.

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

It is a super-2 number, since 2×71057086² = 10098218941622792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71057081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17764270 + ... + 17764273.

It is an arithmetic number, because the mean of its divisors is an integer number (26646408).

Almost surely, 2^71057086 is an apocalyptic number.

71057086 is a deficient number, since it is larger than the sum of its proper divisors (35528546).

71057086 is a wasteful number, since it uses less digits than its factorization.

71057086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35528545.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 71057086 is about 8429.5365234395. The cubic root of 71057086 is about 414.1927230162.

The spelling of 71057086 in words is "seventy-one million, fifty-seven thousand, eighty-six".