2154254521 has 4 divisors (see below), whose sum is σ = 2170699344. Its totient is φ = 2137809700.

The previous prime is 2154254491. The next prime is 2154254537. The reversal of 2154254521 is 1254524512.

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 2154254521 - 2²¹ = 2152157369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154254591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8222215 + ... + 8222476.

It is an arithmetic number, because the mean of its divisors is an integer number (542674836).

Almost surely, 2^2154254521 is an apocalyptic number.

It is an amenable number.

2154254521 is a deficient number, since it is larger than the sum of its proper divisors (16444823).

2154254521 is a wasteful number, since it uses less digits than its factorization.

2154254521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16444822.

The product of its digits is 16000, while the sum is 31.

The square root of 2154254521 is about 46413.9474834882. The cubic root of 2154254521 is about 1291.5136611789.

The spelling of 2154254521 in words is "two billion, one hundred fifty-four million, two hundred fifty-four thousand, five hundred twenty-one".