2155555441 has 8 divisors (see below), whose sum is σ = 2324997864. Its totient is φ = 1986631680.

The previous prime is 2155555429. The next prime is 2155555481. The reversal of 2155555441 is 1445555512.

It can be written as a sum of positive squares in 4 ways, for example, as 655155216 + 1500400225 = 25596^2 + 38735^2 .

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 2155555441 - 2¹⁵ = 2155522673 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 2155555441.

It is not an unprimeable number, because it can be changed into a prime (2155555481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121006 + ... + 137671.

It is an arithmetic number, because the mean of its divisors is an integer number (290624733).

Almost surely, 2^2155555441 is an apocalyptic number.

It is an amenable number.

2155555441 is a deficient number, since it is larger than the sum of its proper divisors (169442423).

2155555441 is a wasteful number, since it uses less digits than its factorization.

2155555441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259331.

The product of its digits is 100000, while the sum is 37.

The square root of 2155555441 is about 46427.9596902556. The cubic root of 2155555441 is about 1291.7735837094.

The spelling of 2155555441 in words is "two billion, one hundred fifty-five million, five hundred fifty-five thousand, four hundred forty-one".