71506243 has 8 divisors (see below), whose sum is σ = 74704896. Its totient is φ = 68363400.

The previous prime is 71506231. The next prime is 71506271. The reversal of 71506243 is 34260517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71506243 - 2¹³ = 71498051 is a prime.

It is a super-2 number, since 2×71506243² = 10226285575950098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71506273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11323 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (9338112).

Almost surely, 2^71506243 is an apocalyptic number.

71506243 is a deficient number, since it is larger than the sum of its proper divisors (3198653).

71506243 is a wasteful number, since it uses less digits than its factorization.

71506243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27905.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 71506243 is about 8456.1364109149. The cubic root of 71506243 is about 415.0636047090.

The spelling of 71506243 in words is "seventy-one million, five hundred six thousand, two hundred forty-three".