2154243522 has 32 divisors (see below), whose sum is σ = 4540446720. Its totient is φ = 679507920.

The previous prime is 2154243521. The next prime is 2154243527. The reversal of 2154243522 is 2253424512.

It is a self number, because there is not a number n which added to its sum of digits gives 2154243522.

It is not an unprimeable number, because it can be changed into a prime (2154243521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93483 + ... + 114225.

It is an arithmetic number, because the mean of its divisors is an integer number (141888960).

Almost surely, 2^2154243522 is an apocalyptic number.

2154243522 is an abundant number, since it is smaller than the sum of its proper divisors (2386203198).

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

2154243522 is a wasteful number, since it uses less digits than its factorization.

2154243522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21678.

The product of its digits is 19200, while the sum is 30.

The square root of 2154243522 is about 46413.8289952467. The cubic root of 2154243522 is about 1291.5114631435.

The spelling of 2154243522 in words is "two billion, one hundred fifty-four million, two hundred forty-three thousand, five hundred twenty-two".