7221442872158 has 4 divisors (see below), whose sum is σ = 10832164308240. Its totient is φ = 3610721436078.

The previous prime is 7221442872143. The next prime is 7221442872181. The reversal of 7221442872158 is 8512782441227.

It is a happy number.

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

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, 1805360718038 + ... + 1805360718041.

It is an arithmetic number, because the mean of its divisors is an integer number (2708041077060).

Almost surely, 2^{7221442872158} is an apocalyptic number.

7221442872158 is a deficient number, since it is larger than the sum of its proper divisors (3610721436082).

7221442872158 is a wasteful number, since it uses less digits than its factorization.

7221442872158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610721436081.

The product of its digits is 4014080, while the sum is 53.

The spelling of 7221442872158 in words is "seven trillion, two hundred twenty-one billion, four hundred forty-two million, eight hundred seventy-two thousand, one hundred fifty-eight".