2155550511 has 8 divisors (see below), whose sum is σ = 2875071024. Its totient is φ = 1436531840.

The previous prime is 2155550503. The next prime is 2155550533. The reversal of 2155550511 is 1150555512.

2155550511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2155550511 - 2³ = 2155550503 is a prime.

It is a super-2 number, since 2×2155550511² = 9292796010944722242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155550591) 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, 115320 + ... + 132701.

It is an arithmetic number, because the mean of its divisors is an integer number (359383878).

Almost surely, 2^2155550511 is an apocalyptic number.

2155550511 is a deficient number, since it is larger than the sum of its proper divisors (719520513).

2155550511 is a wasteful number, since it uses less digits than its factorization.

2155550511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250921.

The product of its (nonzero) digits is 6250, while the sum is 30.

The square root of 2155550511 is about 46427.9065972180. The cubic root of 2155550511 is about 1291.7725988977.

The spelling of 2155550511 in words is "two billion, one hundred fifty-five million, five hundred fifty thousand, five hundred eleven".