2197144557 has 6 divisors (see below), whose sum is σ = 3173653262. Its totient is φ = 1464763032.

The previous prime is 2197144519. The next prime is 2197144567. The reversal of 2197144557 is 7554417912.

2197144557 is a `hidden beast` number, since 2 + 1 + 97 + 1 + 4 + 4 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1660481001 + 536663556 = 40749^2 + 23166^2 .

It is not a de Polignac number, because 2197144557 - 2¹⁴ = 2197128173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197144517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122063578 + ... + 122063595.

Almost surely, 2^2197144557 is an apocalyptic number.

It is an amenable number.

2197144557 is a deficient number, since it is larger than the sum of its proper divisors (976508705).

2197144557 is a wasteful number, since it uses less digits than its factorization.

2197144557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244127179 (or 244127176 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 2197144557 is about 46873.7085902108. The cubic root of 2197144557 is about 1300.0285116035.

The spelling of 2197144557 in words is "two billion, one hundred ninety-seven million, one hundred forty-four thousand, five hundred fifty-seven".