2147555591 has 16 divisors (see below), whose sum is σ = 2233889280. Its totient is φ = 2062853280.

The previous prime is 2147555581. The next prime is 2147555603. The reversal of 2147555591 is 1955557412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2147555591 is a prime.

It is a super-2 number, since 2×2147555591² = 9223990032870718562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147555521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1420526 + ... + 1422036.

It is an arithmetic number, because the mean of its divisors is an integer number (139618080).

Almost surely, 2^2147555591 is an apocalyptic number.

2147555591 is a deficient number, since it is larger than the sum of its proper divisors (86333689).

2147555591 is a wasteful number, since it uses less digits than its factorization.

2147555591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014.

The product of its digits is 315000, while the sum is 44.

The square root of 2147555591 is about 46341.7262410454. The cubic root of 2147555591 is about 1290.1735621689.

The spelling of 2147555591 in words is "two billion, one hundred forty-seven million, five hundred fifty-five thousand, five hundred ninety-one".