2172006442 has 8 divisors (see below), whose sum is σ = 3261010176. Its totient is φ = 1085003052.

The previous prime is 2172006439. The next prime is 2172006457. The reversal of 2172006442 is 2446002712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2172006442² = 9435223968178998728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2172006442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497368 + ... + 501715.

It is an arithmetic number, because the mean of its divisors is an integer number (407626272).

Almost surely, 2^2172006442 is an apocalyptic number.

2172006442 is a deficient number, since it is larger than the sum of its proper divisors (1089003734).

2172006442 is a wasteful number, since it uses less digits than its factorization.

2172006442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000172.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2172006442 is about 46604.7899040431. The cubic root of 2172006442 is about 1295.0514913213.

The spelling of 2172006442 in words is "two billion, one hundred seventy-two million, six thousand, four hundred forty-two".