71021198 has 4 divisors (see below), whose sum is σ = 106531800. Its totient is φ = 35510598.

The previous prime is 71021177. The next prime is 71021207. The reversal of 71021198 is 89112017.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 71021198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17755298 + ... + 17755301.

It is an arithmetic number, because the mean of its divisors is an integer number (26632950).

Almost surely, 2^71021198 is an apocalyptic number.

71021198 is a deficient number, since it is larger than the sum of its proper divisors (35510602).

71021198 is a wasteful number, since it uses less digits than its factorization.

71021198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35510601.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 71021198 is about 8427.4075491814. The cubic root of 71021198 is about 414.1229807265.

The spelling of 71021198 in words is "seventy-one million, twenty-one thousand, one hundred ninety-eight".