71388055 has 4 divisors (see below), whose sum is σ = 85665672. Its totient is φ = 57110440.

The previous prime is 71388047. The next prime is 71388077. The reversal of 71388055 is 55088317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55088317 = 157 ⋅350881.

It is not a de Polignac number, because 71388055 - 2³ = 71388047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7138801 + ... + 7138810.

It is an arithmetic number, because the mean of its divisors is an integer number (21416418).

Almost surely, 2^71388055 is an apocalyptic number.

71388055 is a deficient number, since it is larger than the sum of its proper divisors (14277617).

71388055 is a wasteful number, since it uses less digits than its factorization.

71388055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14277616.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 71388055 is about 8449.1452230388. The cubic root of 71388055 is about 414.8348014279.

The spelling of 71388055 in words is "seventy-one million, three hundred eighty-eight thousand, fifty-five".