71505023 has 8 divisors (see below), whose sum is σ = 72673920. Its totient is φ = 70340760.

The previous prime is 71505017. The next prime is 71505029. The reversal of 71505023 is 32050517.

It is an interprime number because it is at equal distance from previous prime (71505017) and next prime (71505029).

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 71505023 - 2⁶ = 71504959 is a prime.

It is a super-2 number, since 2×71505023² = 10225936628461058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71505023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71505029) 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 7 ways as a sum of consecutive naturals, for example, 43136 + ... + 44762.

It is an arithmetic number, because the mean of its divisors is an integer number (9084240).

Almost surely, 2^71505023 is an apocalyptic number.

71505023 is a deficient number, since it is larger than the sum of its proper divisors (1168897).

71505023 is a wasteful number, since it uses less digits than its factorization.

71505023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 71505023 is about 8456.0642736441. The cubic root of 71505023 is about 415.0612441670.

The spelling of 71505023 in words is "seventy-one million, five hundred five thousand, twenty-three".