71440055 has 4 divisors (see below), whose sum is σ = 85728072. Its totient is φ = 57152040.

The previous prime is 71440051. The next prime is 71440073. The reversal of 71440055 is 55004417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55004417 = 13 ⋅4231109.

It is not a de Polignac number, because 71440055 - 2² = 71440051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440051) 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, 7144001 + ... + 7144010.

It is an arithmetic number, because the mean of its divisors is an integer number (21432018).

Almost surely, 2^71440055 is an apocalyptic number.

71440055 is a deficient number, since it is larger than the sum of its proper divisors (14288017).

71440055 is a wasteful number, since it uses less digits than its factorization.

71440055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14288016.

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

The square root of 71440055 is about 8452.2218972292. The cubic root of 71440055 is about 414.9355006936.

The spelling of 71440055 in words is "seventy-one million, four hundred forty thousand, fifty-five".