71550242 has 4 divisors (see below), whose sum is σ = 107325366. Its totient is φ = 35775120.

The previous prime is 71550239. The next prime is 71550253. The reversal of 71550242 is 24205517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 8649481 = 7931^2 + 2941^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17887559 + ... + 17887562.

Almost surely, 2^71550242 is an apocalyptic number.

71550242 is a deficient number, since it is larger than the sum of its proper divisors (35775124).

71550242 is a wasteful number, since it uses less digits than its factorization.

71550242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35775123.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 71550242 is about 8458.7376126701. The cubic root of 71550242 is about 415.1487191379.

Adding to 71550242 its reverse (24205517), we get a palindrome (95755759).

The spelling of 71550242 in words is "seventy-one million, five hundred fifty thousand, two hundred forty-two".