2197564854 has 16 divisors (see below), whose sum is σ = 4586222592. Its totient is φ = 700672808.

The previous prime is 2197564847. The next prime is 2197564861. The reversal of 2197564854 is 4584657912.

It is an interprime number because it is at equal distance from previous prime (2197564847) and next prime (2197564861).

It is a junction number, because it is equal to n+sod(n) for n = 2197564797 and 2197564806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7962054 + ... + 7962329.

It is an arithmetic number, because the mean of its divisors is an integer number (286638912).

Almost surely, 2^2197564854 is an apocalyptic number.

2197564854 is an abundant number, since it is smaller than the sum of its proper divisors (2388657738).

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

2197564854 is a wasteful number, since it uses less digits than its factorization.

2197564854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15924411.

The product of its digits is 2419200, while the sum is 51.

The square root of 2197564854 is about 46878.1916673414. The cubic root of 2197564854 is about 1300.1114014987. Note that the first 3 decimals are identical.

The spelling of 2197564854 in words is "two billion, one hundred ninety-seven million, five hundred sixty-four thousand, eight hundred fifty-four".