2197064537 has 4 divisors (see below), whose sum is σ = 2216507700. Its totient is φ = 2177621376.

The previous prime is 2197064509. The next prime is 2197064543. The reversal of 2197064537 is 7354607912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 652495936 + 1544568601 = 25544^2 + 39301^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197064537 - 2¹⁰ = 2197063513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2197034537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9721412 + ... + 9721637.

It is an arithmetic number, because the mean of its divisors is an integer number (554126925).

Almost surely, 2^2197064537 is an apocalyptic number.

It is an amenable number.

2197064537 is a deficient number, since it is larger than the sum of its proper divisors (19443163).

2197064537 is a wasteful number, since it uses less digits than its factorization.

2197064537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19443162.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 2197064537 is about 46872.8550122563. The cubic root of 2197064537 is about 1300.0127290667.

The spelling of 2197064537 in words is "two billion, one hundred ninety-seven million, sixty-four thousand, five hundred thirty-seven".