2197855636 has 12 divisors (see below), whose sum is σ = 3847871412. Its totient is φ = 1098463808.

The previous prime is 2197855613. The next prime is 2197855663. The reversal of 2197855636 is 6365587912.

It can be written as a sum of positive squares in 2 ways, for example, as 278890000 + 1918965636 = 16700^2 + 43806^2 .

It is a congruent number.

It is an unprimeable number.

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, 105235 + ... + 124378.

It is an arithmetic number, because the mean of its divisors is an integer number (320655951).

Almost surely, 2^2197855636 is an apocalyptic number.

It is an amenable number.

2197855636 is a deficient number, since it is larger than the sum of its proper divisors (1650015776).

2197855636 is a wasteful number, since it uses less digits than its factorization.

2197855636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232010 (or 232008 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 52.

The square root of 2197855636 is about 46881.2930282432. The cubic root of 2197855636 is about 1300.1687425930.

The spelling of 2197855636 in words is "two billion, one hundred ninety-seven million, eight hundred fifty-five thousand, six hundred thirty-six".