881561822 has 4 divisors (see below), whose sum is σ = 1322342736. Its totient is φ = 440780910.

The previous prime is 881561789. The next prime is 881561827. The reversal of 881561822 is 228165188.

It is a happy number.

881561822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 881561822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881561827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220390454 + ... + 220390457.

It is an arithmetic number, because the mean of its divisors is an integer number (330585684).

Almost surely, 2^881561822 is an apocalyptic number.

881561822 is a deficient number, since it is larger than the sum of its proper divisors (440780914).

881561822 is a wasteful number, since it uses less digits than its factorization.

881561822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440780913.

The product of its digits is 61440, while the sum is 41.

The square root of 881561822 is about 29691.1067830083. The cubic root of 881561822 is about 958.8505564249.

The spelling of 881561822 in words is "eight hundred eighty-one million, five hundred sixty-one thousand, eight hundred twenty-two".