2192051878 has 4 divisors (see below), whose sum is σ = 3288077820. Its totient is φ = 1096025938.

The previous prime is 2192051861. The next prime is 2192051879. The reversal of 2192051878 is 8781502912.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2192051879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548012968 + ... + 548012971.

It is an arithmetic number, because the mean of its divisors is an integer number (822019455).

Almost surely, 2^2192051878 is an apocalyptic number.

2192051878 is a deficient number, since it is larger than the sum of its proper divisors (1096025942).

2192051878 is a wasteful number, since it uses less digits than its factorization.

2192051878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096025941.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 2192051878 is about 46819.3536691826. The cubic root of 2192051878 is about 1299.0233054430.

The spelling of 2192051878 in words is "two billion, one hundred ninety-two million, fifty-one thousand, eight hundred seventy-eight".