71506047 has 4 divisors (see below), whose sum is σ = 95341400. Its totient is φ = 47670696.

The previous prime is 71506037. The next prime is 71506051. The reversal of 71506047 is 74060517.

It is a happy number.

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

It is not a de Polignac number, because 71506047 - 2⁴ = 71506031 is a prime.

It is a super-2 number, since 2×71506047² = 10226229515132418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71506037) 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 3 ways as a sum of consecutive naturals, for example, 11917672 + ... + 11917677.

It is an arithmetic number, because the mean of its divisors is an integer number (23835350).

Almost surely, 2^71506047 is an apocalyptic number.

71506047 is a deficient number, since it is larger than the sum of its proper divisors (23835353).

71506047 is a wasteful number, since it uses less digits than its factorization.

71506047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23835352.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 71506047 is about 8456.1248216899. The cubic root of 71506047 is about 415.0632254762.

The spelling of 71506047 in words is "seventy-one million, five hundred six thousand, forty-seven".