71538241 has 4 divisors (see below), whose sum is σ = 71556400. Its totient is φ = 71520084.

The previous prime is 71538239. The next prime is 71538293. The reversal of 71538241 is 14283517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14283517 = 37 ⋅386041.

It is a cyclic number.

It is not a de Polignac number, because 71538241 - 2¹ = 71538239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71538221) 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, 411 + ... + 11968.

It is an arithmetic number, because the mean of its divisors is an integer number (17889100).

Almost surely, 2^71538241 is an apocalyptic number.

It is an amenable number.

71538241 is a deficient number, since it is larger than the sum of its proper divisors (18159).

71538241 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 71538241 = (37421815)₁₁.

71538241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18158.

The product of its digits is 6720, while the sum is 31.

The square root of 71538241 is about 8458.0281981086. The cubic root of 71538241 is about 415.1255071113.

The spelling of 71538241 in words is "seventy-one million, five hundred thirty-eight thousand, two hundred forty-one".