155889925 has 6 divisors (see below), whose sum is σ = 193303538. Its totient is φ = 124711920.

The previous prime is 155889919. The next prime is 155890001. The reversal of 155889925 is 529988551.

It can be written as a sum of positive squares in 3 ways, for example, as 36796356 + 119093569 = 6066^2 + 10913^2 .

It is not a de Polignac number, because 155889925 - 2⁵ = 155889893 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 3117774 + ... + 3117823.

Almost surely, 2^155889925 is an apocalyptic number.

It is an amenable number.

155889925 is a deficient number, since it is larger than the sum of its proper divisors (37413613).

155889925 is an equidigital number, since it uses as much as digits as its factorization.

155889925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235607 (or 6235602 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 52.

The square root of 155889925 is about 12485.5886925687. The cubic root of 155889925 is about 538.1946166459.

The spelling of 155889925 in words is "one hundred fifty-five million, eight hundred eighty-nine thousand, nine hundred twenty-five".