1555041225 has 24 divisors (see below), whose sum is σ = 2706319840. Its totient is φ = 785704320.

The previous prime is 1555041209. The next prime is 1555041259. The reversal of 1555041225 is 5221405551.

It is not a de Polignac number, because 1555041225 - 2⁴ = 1555041209 is a prime.

It is a super-2 number, since 2×1555041225² = 4836306422899001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1555041192 and 1555041201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 544204 + ... + 547053.

Almost surely, 2^1555041225 is an apocalyptic number.

1555041225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1555041225 is a deficient number, since it is larger than the sum of its proper divisors (1151278615).

1555041225 is a wasteful number, since it uses less digits than its factorization.

1555041225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091289 (or 1091284 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 1555041225 is about 39434.0110184090. The cubic root of 1555041225 is about 1158.5478323102.

Adding to 1555041225 its reverse (5221405551), we get a palindrome (6776446776).

The spelling of 1555041225 in words is "one billion, five hundred fifty-five million, forty-one thousand, two hundred twenty-five".