71542155 has 16 divisors (see below), whose sum is σ = 114750720. Its totient is φ = 38061408.

The previous prime is 71542151. The next prime is 71542181. The reversal of 71542155 is 55124517.

It is not a de Polignac number, because 71542155 - 2² = 71542151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71542151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594 + ... + 11976.

It is an arithmetic number, because the mean of its divisors is an integer number (7171920).

Almost surely, 2^71542155 is an apocalyptic number.

71542155 is a deficient number, since it is larger than the sum of its proper divisors (43208565).

71542155 is a wasteful number, since it uses less digits than its factorization.

71542155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11810.

The product of its digits is 7000, while the sum is 30.

The square root of 71542155 is about 8458.2595727490. The cubic root of 71542155 is about 415.1330777550.

The spelling of 71542155 in words is "seventy-one million, five hundred forty-two thousand, one hundred fifty-five".