2154619553 has 4 divisors (see below), whose sum is σ = 2248298688. Its totient is φ = 2060940420.

The previous prime is 2154619549. The next prime is 2154619633. The reversal of 2154619553 is 3559164512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2154619553 - 2² = 2154619549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154619553.

It is not an unprimeable number, because it can be changed into a prime (2154619153) 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, 46839533 + ... + 46839578.

It is an arithmetic number, because the mean of its divisors is an integer number (562074672).

Almost surely, 2^2154619553 is an apocalyptic number.

2154619553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2154619553 is a deficient number, since it is larger than the sum of its proper divisors (93679135).

2154619553 is an equidigital number, since it uses as much as digits as its factorization.

2154619553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93679134.

The product of its digits is 162000, while the sum is 41.

The square root of 2154619553 is about 46417.8796693688. The cubic root of 2154619553 is about 1291.5866047710.

The spelling of 2154619553 in words is "two billion, one hundred fifty-four million, six hundred nineteen thousand, five hundred fifty-three".