71102205 has 30 divisors (see below), whose sum is σ = 127762206. Its totient is φ = 37830672.

The previous prime is 71102191. The next prime is 71102221. The reversal of 71102205 is 50220117.

It can be written as a sum of positive squares in only one way, i.e., 56881764 + 14220441 = 7542^2 + 3771^2 .

It is not a de Polignac number, because 71102205 - 2¹³ = 71094013 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 169486 + ... + 169904.

Almost surely, 2^71102205 is an apocalyptic number.

It is an amenable number.

71102205 is a deficient number, since it is larger than the sum of its proper divisors (56660001).

71102205 is an frugal number, since it uses more digits than its factorization.

71102205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 71102205 is about 8432.2123431517. The cubic root of 71102205 is about 414.2803708897.

The spelling of 71102205 in words is "seventy-one million, one hundred two thousand, two hundred five".