71567138 has 4 divisors (see below), whose sum is σ = 107350710. Its totient is φ = 35783568.

The previous prime is 71567117. The next prime is 71567141. The reversal of 71567138 is 83176517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83176517 = 103 ⋅807539.

It can be written as a sum of positive squares in only one way, i.e., 39225169 + 32341969 = 6263^2 + 5687^2 .

It is a super-2 number, since 2×71567138² = 10243710483022088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17891783 + ... + 17891786.

Almost surely, 2^71567138 is an apocalyptic number.

71567138 is a deficient number, since it is larger than the sum of its proper divisors (35783572).

71567138 is a wasteful number, since it uses less digits than its factorization.

71567138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35783571.

The product of its digits is 35280, while the sum is 38.

The square root of 71567138 is about 8459.7362843058. The cubic root of 71567138 is about 415.1813945489.

The spelling of 71567138 in words is "seventy-one million, five hundred sixty-seven thousand, one hundred thirty-eight".