2161214653 has 8 divisors (see below), whose sum is σ = 2360244096. Its totient is φ = 1966868400.

The previous prime is 2161214633. The next prime is 2161214687. The reversal of 2161214653 is 3564121612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161214653 - 2²⁵ = 2127660221 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 (2161214633) 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 7 ways as a sum of consecutive naturals, for example, 1169833 + ... + 1171678.

It is an arithmetic number, because the mean of its divisors is an integer number (295030512).

Almost surely, 2^2161214653 is an apocalyptic number.

It is an amenable number.

2161214653 is a deficient number, since it is larger than the sum of its proper divisors (199029443).

2161214653 is a wasteful number, since it uses less digits than its factorization.

2161214653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341595.

The product of its digits is 8640, while the sum is 31.

The square root of 2161214653 is about 46488.8659035688. The cubic root of 2161214653 is about 1292.9030732956.

The spelling of 2161214653 in words is "two billion, one hundred sixty-one million, two hundred fourteen thousand, six hundred fifty-three".