71318542 has 4 divisors (see below), whose sum is σ = 106977816. Its totient is φ = 35659270.

The previous prime is 71318509. The next prime is 71318543. The reversal of 71318542 is 24581317.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71318543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17829634 + ... + 17829637.

It is an arithmetic number, because the mean of its divisors is an integer number (26744454).

Almost surely, 2^71318542 is an apocalyptic number.

71318542 is a deficient number, since it is larger than the sum of its proper divisors (35659274).

71318542 is a wasteful number, since it uses less digits than its factorization.

71318542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35659273.

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

The square root of 71318542 is about 8445.0306097728. The cubic root of 71318542 is about 414.7001114050.

Adding to 71318542 its reverse (24581317), we get a palindrome (95899859).

The spelling of 71318542 in words is "seventy-one million, three hundred eighteen thousand, five hundred forty-two".