2153121553 has 48 divisors (see below), whose sum is σ = 2671704000. Its totient is φ = 1722885120.

The previous prime is 2153121541. The next prime is 2153121557. The reversal of 2153121553 is 3551213512.

It is not a de Polignac number, because 2153121553 - 2⁹ = 2153121041 is a prime.

It is a super-3 number, since 3×2153121553³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2153121557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3478078 + ... + 3478696.

It is an arithmetic number, because the mean of its divisors is an integer number (55660500).

Almost surely, 2^2153121553 is an apocalyptic number.

It is an amenable number.

2153121553 is a deficient number, since it is larger than the sum of its proper divisors (518582447).

2153121553 is a wasteful number, since it uses less digits than its factorization.

2153121553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 755 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 2153121553 is about 46401.7408401883. The cubic root of 2153121553 is about 1291.2872100288.

The spelling of 2153121553 in words is "two billion, one hundred fifty-three million, one hundred twenty-one thousand, five hundred fifty-three".