1555251325 has 24 divisors (see below), whose sum is σ = 1945328616. Its totient is φ = 1233408000.

The previous prime is 1555251311. The next prime is 1555251337. The reversal of 1555251325 is 5231525551.

It can be written as a sum of positive squares in 12 ways, for example, as 138933369 + 1416317956 = 11787^2 + 37634^2 .

It is not a de Polignac number, because 1555251325 - 2²⁹ = 1018380413 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1764885 + ... + 1765765.

It is an arithmetic number, because the mean of its divisors is an integer number (81055359).

Almost surely, 2^1555251325 is an apocalyptic number.

It is an amenable number.

1555251325 is a deficient number, since it is larger than the sum of its proper divisors (390077291).

1555251325 is a wasteful number, since it uses less digits than its factorization.

1555251325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1420 counting only the distinct ones).

The product of its digits is 37500, while the sum is 34.

The square root of 1555251325 is about 39436.6748725092. The cubic root of 1555251325 is about 1158.6000066907.

Adding to 1555251325 its reverse (5231525551), we get a palindrome (6786776876).

The spelling of 1555251325 in words is "one billion, five hundred fifty-five million, two hundred fifty-one thousand, three hundred twenty-five".