194281564 has 12 divisors (see below), whose sum is σ = 340349688. Its totient is φ = 97038800.

The previous prime is 194281553. The next prime is 194281567. The reversal of 194281564 is 465182491.

It is a super-2 number, since 2×194281564² = 75490652220572192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194281567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21127 + ... + 28894.

It is an arithmetic number, because the mean of its divisors is an integer number (28362474).

Almost surely, 2^194281564 is an apocalyptic number.

It is an amenable number.

194281564 is a deficient number, since it is larger than the sum of its proper divisors (146068124).

194281564 is a wasteful number, since it uses less digits than its factorization.

194281564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50996 (or 50994 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 194281564 is about 13938.4921709631. The cubic root of 194281564 is about 579.1759641682.

The spelling of 194281564 in words is "one hundred ninety-four million, two hundred eighty-one thousand, five hundred sixty-four".