71481518 has 4 divisors (see below), whose sum is σ = 107222280. Its totient is φ = 35740758.

The previous prime is 71481517. The next prime is 71481533. The reversal of 71481518 is 81518417.

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 (71481517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17870378 + ... + 17870381.

It is an arithmetic number, because the mean of its divisors is an integer number (26805570).

Almost surely, 2^71481518 is an apocalyptic number.

71481518 is a deficient number, since it is larger than the sum of its proper divisors (35740762).

71481518 is a wasteful number, since it uses less digits than its factorization.

71481518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35740761.

The product of its digits is 8960, while the sum is 35.

The square root of 71481518 is about 8454.6743284410. The cubic root of 71481518 is about 415.0157597925.

The spelling of 71481518 in words is "seventy-one million, four hundred eighty-one thousand, five hundred eighteen".