2156355555 has 32 divisors (see below), whose sum is σ = 3533580288. Its totient is φ = 1122576000.

The previous prime is 2156355533. The next prime is 2156355563. The reversal of 2156355555 is 5555536512.

2156355555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2156355555 - 2⁶ = 2156355491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97542 + ... + 117588.

It is an arithmetic number, because the mean of its divisors is an integer number (110424384).

Almost surely, 2^2156355555 is an apocalyptic number.

2156355555 is a deficient number, since it is larger than the sum of its proper divisors (1377224733).

2156355555 is a wasteful number, since it uses less digits than its factorization.

2156355555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20227.

The product of its digits is 562500, while the sum is 42.

The square root of 2156355555 is about 46436.5756166408. The cubic root of 2156355555 is about 1291.9333937601.

The spelling of 2156355555 in words is "two billion, one hundred fifty-six million, three hundred fifty-five thousand, five hundred fifty-five".