2153521554 has 16 divisors (see below), whose sum is σ = 4322939520. Its totient is φ = 715191120.

The previous prime is 2153521553. The next prime is 2153521567. The reversal of 2153521554 is 4551253512.

It is not an unprimeable number, because it can be changed into a prime (2153521553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660589 + ... + 663840.

It is an arithmetic number, because the mean of its divisors is an integer number (270183720).

Almost surely, 2^2153521554 is an apocalyptic number.

2153521554 is an abundant number, since it is smaller than the sum of its proper divisors (2169417966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2153521554 is a wasteful number, since it uses less digits than its factorization.

2153521554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324705.

The product of its digits is 30000, while the sum is 33.

The square root of 2153521554 is about 46406.0508339160. The cubic root of 2153521554 is about 1291.3671690062.

The spelling of 2153521554 in words is "two billion, one hundred fifty-three million, five hundred twenty-one thousand, five hundred fifty-four".