2153251553 has 4 divisors (see below), whose sum is σ = 2153689860. Its totient is φ = 2152813248.

The previous prime is 2153251549. The next prime is 2153251579. The reversal of 2153251553 is 3551523512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 832437904 + 1320813649 = 28852^2 + 36343^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153251553 - 2² = 2153251549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153251253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211700 + ... + 221637.

It is an arithmetic number, because the mean of its divisors is an integer number (538422465).

Almost surely, 2^2153251553 is an apocalyptic number.

It is an amenable number.

2153251553 is a deficient number, since it is larger than the sum of its proper divisors (438307).

2153251553 is an equidigital number, since it uses as much as digits as its factorization.

2153251553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438306.

The product of its digits is 22500, while the sum is 32.

The square root of 2153251553 is about 46403.1416285579. The cubic root of 2153251553 is about 1291.3131977177.

The spelling of 2153251553 in words is "two billion, one hundred fifty-three million, two hundred fifty-one thousand, five hundred fifty-three".