155503425 has 48 divisors (see below), whose sum is σ = 320550912. Its totient is φ = 64622400.

The previous prime is 155503393. The next prime is 155503441. The reversal of 155503425 is 524305551.

It is a happy number.

It is not a de Polignac number, because 155503425 - 2⁵ = 155503393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155503392 and 155503401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7689 + ... + 19238.

It is an arithmetic number, because the mean of its divisors is an integer number (6678144).

Almost surely, 2^155503425 is an apocalyptic number.

155503425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155503425 is an abundant number, since it is smaller than the sum of its proper divisors (165047487).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155503425 is a wasteful number, since it uses less digits than its factorization.

155503425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26958 (or 26953 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 155503425 is about 12470.1012425722. The cubic root of 155503425 is about 537.7494641541.

Adding to 155503425 its reverse (524305551), we get a palindrome (679808976).

The spelling of 155503425 in words is "one hundred fifty-five million, five hundred three thousand, four hundred twenty-five".