71422731 has 12 divisors (see below), whose sum is σ = 103708800. Its totient is φ = 47364720.

The previous prime is 71422723. The next prime is 71422733. The reversal of 71422731 is 13722417.

It is a happy number.

It is not a de Polignac number, because 71422731 - 2³ = 71422723 is a prime.

It is a super-2 number, since 2×71422731² = 10202413006996722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71422695 and 71422704.

It is not an unprimeable number, because it can be changed into a prime (71422733) 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 11 ways as a sum of consecutive naturals, for example, 19056 + ... + 22493.

It is an arithmetic number, because the mean of its divisors is an integer number (8642400).

Almost surely, 2^71422731 is an apocalyptic number.

71422731 is a deficient number, since it is larger than the sum of its proper divisors (32286069).

71422731 is a wasteful number, since it uses less digits than its factorization.

71422731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41746 (or 41743 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 71422731 is about 8451.1970158079. The cubic root of 71422731 is about 414.9019577755.

The spelling of 71422731 in words is "seventy-one million, four hundred twenty-two thousand, seven hundred thirty-one".