2197523636 has 24 divisors (see below), whose sum is σ = 4794597696. Its totient is φ = 856177920.

The previous prime is 2197523623. The next prime is 2197523659. The reversal of 2197523636 is 6363257912.

2197523636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2197523636² = 9658220261557320992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567101 + ... + 3567716.

It is an arithmetic number, because the mean of its divisors is an integer number (199774904).

Almost surely, 2^2197523636 is an apocalyptic number.

It is an amenable number.

2197523636 is an abundant number, since it is smaller than the sum of its proper divisors (2597074060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2197523636 is a wasteful number, since it uses less digits than its factorization.

2197523636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134839 (or 7134837 counting only the distinct ones).

The product of its digits is 408240, while the sum is 44.

The square root of 2197523636 is about 46877.7520365471. The cubic root of 2197523636 is about 1300.1032730580.

The spelling of 2197523636 in words is "two billion, one hundred ninety-seven million, five hundred twenty-three thousand, six hundred thirty-six".