71226431 has 4 divisors (see below), whose sum is σ = 71363664. Its totient is φ = 71089200.

The previous prime is 71226391. The next prime is 71226439. The reversal of 71226431 is 13462217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13462217 = 547 ⋅24611.

It is a cyclic number.

It is not a de Polignac number, because 71226431 - 2²⁶ = 4117567 is a prime.

It is a super-2 number, since 2×71226431² = 10146408945995522, 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 71226431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71226439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67835 + ... + 68876.

It is an arithmetic number, because the mean of its divisors is an integer number (17840916).

Almost surely, 2^71226431 is an apocalyptic number.

71226431 is a deficient number, since it is larger than the sum of its proper divisors (137233).

71226431 is a wasteful number, since it uses less digits than its factorization.

71226431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137232.

The product of its digits is 2016, while the sum is 26.

The square root of 71226431 is about 8439.5752855224. The cubic root of 71226431 is about 414.5215000758.

Adding to 71226431 its reverse (13462217), we get a palindrome (84688648).

The spelling of 71226431 in words is "seventy-one million, two hundred twenty-six thousand, four hundred thirty-one".