2145153555 has 24 divisors (see below), whose sum is σ = 3797381952. Its totient is φ = 1119738624.

The previous prime is 2145153553. The next prime is 2145153559. The reversal of 2145153555 is 5553515412.

2145153555 is a `hidden beast` number, since 2 + 1 + 4 + 51 + 53 + 555 = 666.

It is not a de Polignac number, because 2145153555 - 2¹ = 2145153553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145153553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505014 + ... + 509243.

It is an arithmetic number, because the mean of its divisors is an integer number (158224248).

Almost surely, 2^2145153555 is an apocalyptic number.

2145153555 is a deficient number, since it is larger than the sum of its proper divisors (1652228397).

2145153555 is a wasteful number, since it uses less digits than its factorization.

2145153555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014315 (or 1014312 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 2145153555 is about 46315.8024328630. The cubic root of 2145153555 is about 1289.6923639951.

Adding to 2145153555 its reverse (5553515412), we get a palindrome (7698668967).

The spelling of 2145153555 in words is "two billion, one hundred forty-five million, one hundred fifty-three thousand, five hundred fifty-five".