71172855 has 48 divisors (see below), whose sum is σ = 134447040. Its totient is φ = 34619904.

The previous prime is 71172853. The next prime is 71172887. The reversal of 71172855 is 55827117.

It is not a de Polignac number, because 71172855 - 2¹ = 71172853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71172853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51382 + ... + 52748.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^71172855 is an apocalyptic number.

71172855 is a deficient number, since it is larger than the sum of its proper divisors (63274185).

71172855 is a wasteful number, since it uses less digits than its factorization.

71172855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480 (or 1477 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 71172855 is about 8436.4005950405. The cubic root of 71172855 is about 414.4175406596.

It can be divided in two parts, 71172 and 855, that added together give a palindrome (72027).

The spelling of 71172855 in words is "seventy-one million, one hundred seventy-two thousand, eight hundred fifty-five".