71470231 has 4 divisors (see below), whose sum is σ = 81680272. Its totient is φ = 61260192.

The previous prime is 71470211. The next prime is 71470249. The reversal of 71470231 is 13207417.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13207417 = 563 ⋅23459.

It is not a de Polignac number, because 71470231 - 2⁷ = 71470103 is a prime.

It is a super-2 number, since 2×71470231² = 10215987838386722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71470196 and 71470205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71470211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105010 + ... + 5105023.

It is an arithmetic number, because the mean of its divisors is an integer number (20420068).

Almost surely, 2^71470231 is an apocalyptic number.

71470231 is a deficient number, since it is larger than the sum of its proper divisors (10210041).

71470231 is a wasteful number, since it uses less digits than its factorization.

71470231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210040.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 71470231 is about 8454.0068015113. The cubic root of 71470231 is about 414.9939148476.

Adding to 71470231 its reverse (13207417), we get a palindrome (84677648).

The spelling of 71470231 in words is "seventy-one million, four hundred seventy thousand, two hundred thirty-one".