71244133 has 6 divisors (see below), whose sum is σ = 74476934. Its totient is φ = 68146056.

The previous prime is 71244113. The next prime is 71244143. The reversal of 71244133 is 33144217.

It can be written as a sum of positive squares in only one way, i.e., 68939809 + 2304324 = 8303^2 + 1518^2 .

It is not a de Polignac number, because 71244133 - 2¹⁷ = 71113061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71244098 and 71244107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71244113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66810 + ... + 67867.

Almost surely, 2^71244133 is an apocalyptic number.

It is an amenable number.

71244133 is a deficient number, since it is larger than the sum of its proper divisors (3232801).

71244133 is a wasteful number, since it uses less digits than its factorization.

71244133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134723 (or 134700 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 71244133 is about 8440.6239698259. The cubic root of 71244133 is about 414.5558377586. Note that the first 3 decimals are identical.

The spelling of 71244133 in words is "seventy-one million, two hundred forty-four thousand, one hundred thirty-three".