2154445252 has 6 divisors (see below), whose sum is σ = 3770279198. Its totient is φ = 1077222624.

The previous prime is 2154445247. The next prime is 2154445289. The reversal of 2154445252 is 2525444512.

It can be written as a sum of positive squares in only one way, i.e., 2154445056 + 196 = 46416^2 + 14^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269305653 + ... + 269305660.

Almost surely, 2^2154445252 is an apocalyptic number.

It is an amenable number.

2154445252 is a deficient number, since it is larger than the sum of its proper divisors (1615833946).

2154445252 is a wasteful number, since it uses less digits than its factorization.

2154445252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538611317 (or 538611315 counting only the distinct ones).

The product of its digits is 64000, while the sum is 34.

The square root of 2154445252 is about 46416.0021113409. The cubic root of 2154445252 is about 1291.5517755893.

Adding to 2154445252 its reverse (2525444512), we get a palindrome (4679889764).

The spelling of 2154445252 in words is "two billion, one hundred fifty-four million, four hundred forty-five thousand, two hundred fifty-two".