71200538 has 4 divisors (see below), whose sum is σ = 106800810. Its totient is φ = 35600268.

The previous prime is 71200531. The next prime is 71200541. The reversal of 71200538 is 83500217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83500217 = 1423 ⋅58679.

It can be written as a sum of positive squares in only one way, i.e., 37246609 + 33953929 = 6103^2 + 5827^2 .

It is a super-2 number, since 2×71200538² = 10139033222978888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71200531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17800133 + ... + 17800136.

Almost surely, 2^71200538 is an apocalyptic number.

71200538 is a deficient number, since it is larger than the sum of its proper divisors (35600272).

71200538 is a wasteful number, since it uses less digits than its factorization.

71200538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35600271.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71200538 is about 8438.0411233888. The cubic root of 71200538 is about 414.4712635464.

The spelling of 71200538 in words is "seventy-one million, two hundred thousand, five hundred thirty-eight".