2155658553 has 12 divisors (see below), whose sum is σ = 3114618468. Its totient is φ = 1436695200.

The previous prime is 2155658539. The next prime is 2155658567. The reversal of 2155658553 is 3558565512.

It is a happy number.

2155658553 is a `hidden beast` number, since 2 + 1 + 5 + 565 + 85 + 5 + 3 = 666.

2155658553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2155658539) and next prime (2155658567).

It can be written as a sum of positive squares in 2 ways, for example, as 709529769 + 1446128784 = 26637^2 + 38028^2 .

It is not a de Polignac number, because 2155658553 - 2¹⁰ = 2155657529 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2155658499 and 2155658508.

It is not an unprimeable number, because it can be changed into a prime (2155658573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 951 + ... + 65667.

It is an arithmetic number, because the mean of its divisors is an integer number (259551539).

Almost surely, 2^2155658553 is an apocalyptic number.

It is an amenable number.

2155658553 is a deficient number, since it is larger than the sum of its proper divisors (958959915).

2155658553 is a wasteful number, since it uses less digits than its factorization.

2155658553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68424 (or 68421 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The square root of 2155658553 is about 46429.0701285305. The cubic root of 2155658553 is about 1291.7941809116.

The spelling of 2155658553 in words is "two billion, one hundred fifty-five million, six hundred fifty-eight thousand, five hundred fifty-three".