190055022187 has 4 divisors (see below), whose sum is σ = 190211705200. Its totient is φ = 189898339176.

The previous prime is 190055022151. The next prime is 190055022197. The reversal of 190055022187 is 781220550091.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190055022187 is a prime.

It is a super-2 number, since 2×190055022187² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190055022127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78339687 + ... + 78342112.

It is an arithmetic number, because the mean of its divisors is an integer number (47552926300).

Almost surely, 2^190055022187 is an apocalyptic number.

190055022187 is a deficient number, since it is larger than the sum of its proper divisors (156683013).

190055022187 is a wasteful number, since it uses less digits than its factorization.

190055022187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156683012.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 190055022187 in words is "one hundred ninety billion, fifty-five million, twenty-two thousand, one hundred eighty-seven".