2164535551 has 4 divisors (see below), whose sum is σ = 2166596104. Its totient is φ = 2162475000.

The previous prime is 2164535533. The next prime is 2164535561. The reversal of 2164535551 is 1555354612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2164535551 - 2⁵ = 2164535519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2164535551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164535501) 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 3 ways as a sum of consecutive naturals, for example, 1028700 + ... + 1030801.

It is an arithmetic number, because the mean of its divisors is an integer number (541649026).

Almost surely, 2^2164535551 is an apocalyptic number.

2164535551 is a deficient number, since it is larger than the sum of its proper divisors (2060553).

2164535551 is a wasteful number, since it uses less digits than its factorization.

2164535551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060552.

The product of its digits is 90000, while the sum is 37.

The square root of 2164535551 is about 46524.5693263248. The cubic root of 2164535551 is about 1293.5649544796.

The spelling of 2164535551 in words is "two billion, one hundred sixty-four million, five hundred thirty-five thousand, five hundred fifty-one".