2251604452 has 6 divisors (see below), whose sum is σ = 3940307798. Its totient is φ = 1125802224.

The previous prime is 2251604417. The next prime is 2251604473. The reversal of 2251604452 is 2544061522.

It can be written as a sum of positive squares in only one way, i.e., 2143319616 + 108284836 = 46296^2 + 10406^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 281450553 + ... + 281450560.

Almost surely, 2^2251604452 is an apocalyptic number.

It is an amenable number.

2251604452 is a deficient number, since it is larger than the sum of its proper divisors (1688703346).

2251604452 is a wasteful number, since it uses less digits than its factorization.

2251604452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562901117 (or 562901115 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 2251604452 is about 47451.0742976384. The cubic root of 2251604452 is about 1310.6820937480.

Adding to 2251604452 its reverse (2544061522), we get a palindrome (4795665974).

The spelling of 2251604452 in words is "two billion, two hundred fifty-one million, six hundred four thousand, four hundred fifty-two".