1551884225 has 24 divisors (see below), whose sum is σ = 1959817272. Its totient is φ = 1218700800.

The previous prime is 1551884209. The next prime is 1551884227. The reversal of 1551884225 is 5224881551.

It can be written as a sum of positive squares in 12 ways, for example, as 1234046641 + 317837584 = 35129^2 + 17828^2 .

It is not a de Polignac number, because 1551884225 - 2⁴ = 1551884209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551884227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1300229 + ... + 1301421.

It is an arithmetic number, because the mean of its divisors is an integer number (81659053).

Almost surely, 2^1551884225 is an apocalyptic number.

It is an amenable number.

1551884225 is a deficient number, since it is larger than the sum of its proper divisors (407933047).

1551884225 is a wasteful number, since it uses less digits than its factorization.

1551884225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2112 counting only the distinct ones).

The product of its digits is 128000, while the sum is 41.

The square root of 1551884225 is about 39393.9617835018. The cubic root of 1551884225 is about 1157.7632843114.

The spelling of 1551884225 in words is "one billion, five hundred fifty-one million, eight hundred eighty-four thousand, two hundred twenty-five".