71042223 has 16 divisors (see below), whose sum is σ = 108774656. Its totient is φ = 40400640.

The previous prime is 71042219. The next prime is 71042227. The reversal of 71042223 is 32224017.

It is an interprime number because it is at equal distance from previous prime (71042219) and next prime (71042227).

It is not a de Polignac number, because 71042223 - 2² = 71042219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71042223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71042227) 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, 3586 + ... + 12447.

It is an arithmetic number, because the mean of its divisors is an integer number (6798416).

Almost surely, 2^71042223 is an apocalyptic number.

71042223 is a deficient number, since it is larger than the sum of its proper divisors (37732433).

71042223 is a wasteful number, since it uses less digits than its factorization.

71042223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16254.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 71042223 is about 8428.6548748896. The cubic root of 71042223 is about 414.1638421259.

The spelling of 71042223 in words is "seventy-one million, forty-two thousand, two hundred twenty-three".