1555224425 has 12 divisors (see below), whose sum is σ = 1931131980. Its totient is φ = 1242467520.

The previous prime is 1555224403. The next prime is 1555224427. The reversal of 1555224425 is 5244225551.

It can be written as a sum of positive squares in 6 ways, for example, as 232593001 + 1322631424 = 15251^2 + 36368^2 .

It is not a de Polignac number, because 1555224425 - 2⁸ = 1555224169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1555224427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24110 + ... + 60759.

It is an arithmetic number, because the mean of its divisors is an integer number (160927665).

Almost surely, 2^1555224425 is an apocalyptic number.

It is an amenable number.

1555224425 is a deficient number, since it is larger than the sum of its proper divisors (375907555).

1555224425 is an equidigital number, since it uses as much as digits as its factorization.

1555224425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85612 (or 85607 counting only the distinct ones).

The product of its digits is 80000, while the sum is 35.

The square root of 1555224425 is about 39436.3338179400. Note that the first 3 decimals coincide. The cubic root of 1555224425 is about 1158.5933268443.

Adding to 1555224425 its reverse (5244225551), we get a palindrome (6799449976).

The spelling of 1555224425 in words is "one billion, five hundred fifty-five million, two hundred twenty-four thousand, four hundred twenty-five".