2190971653 has 16 divisors (see below), whose sum is σ = 2419502400. Its totient is φ = 1971112320.

The previous prime is 2190971639. The next prime is 2190971659. The reversal of 2190971653 is 3561790912.

It is a cyclic number.

It is not a de Polignac number, because 2190971653 - 2²⁵ = 2157417221 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 (2190971659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861658 + ... + 864196.

It is an arithmetic number, because the mean of its divisors is an integer number (151218900).

Almost surely, 2^2190971653 is an apocalyptic number.

It is an amenable number.

2190971653 is a deficient number, since it is larger than the sum of its proper divisors (228530747).

2190971653 is a wasteful number, since it uses less digits than its factorization.

2190971653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 2190971653 is about 46807.8161528606. The cubic root of 2190971653 is about 1298.8098877423.

The spelling of 2190971653 in words is "two billion, one hundred ninety million, nine hundred seventy-one thousand, six hundred fifty-three".