1555044225 has 24 divisors (see below), whose sum is σ = 2938294080. Its totient is φ = 710877120.

The previous prime is 1555044203. The next prime is 1555044241. The reversal of 1555044225 is 5224405551.

It is not a de Polignac number, because 1555044225 - 2¹⁴ = 1555027841 is a prime.

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 in 23 ways as a sum of consecutive naturals, for example, 1480470 + ... + 1481519.

It is an arithmetic number, because the mean of its divisors is an integer number (122428920).

Almost surely, 2^1555044225 is an apocalyptic number.

1555044225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1555044225 is a deficient number, since it is larger than the sum of its proper divisors (1383249855).

1555044225 is a wasteful number, since it uses less digits than its factorization.

1555044225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962009 (or 2962004 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

The square root of 1555044225 is about 39434.0490566211. The cubic root of 1555044225 is about 1158.5485773368.

Adding to 1555044225 its reverse (5224405551), we get a palindrome (6779449776).

The spelling of 1555044225 in words is "one billion, five hundred fifty-five million, forty-four thousand, two hundred twenty-five".