2155235553 has 16 divisors (see below), whose sum is σ = 3221202240. Its totient is φ = 1424106432.

The previous prime is 2155235549. The next prime is 2155235573. The reversal of 2155235553 is 3555325512.

2155235553 is a `hidden beast` number, since 2 + 1 + 552 + 3 + 55 + 53 = 666.

It is not a de Polignac number, because 2155235553 - 2² = 2155235549 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2155235573) 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, 350151 + ... + 356252.

It is an arithmetic number, because the mean of its divisors is an integer number (201325140).

Almost surely, 2^2155235553 is an apocalyptic number.

It is an amenable number.

2155235553 is a deficient number, since it is larger than the sum of its proper divisors (1065966687).

2155235553 is a wasteful number, since it uses less digits than its factorization.

2155235553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706525 (or 706519 counting only the distinct ones).

The product of its digits is 112500, while the sum is 36.

The square root of 2155235553 is about 46424.5145693523. The cubic root of 2155235553 is about 1291.7096801012.

The spelling of 2155235553 in words is "two billion, one hundred fifty-five million, two hundred thirty-five thousand, five hundred fifty-three".