155889225 has 48 divisors (see below), whose sum is σ = 288394240. Its totient is φ = 82555200.

The previous prime is 155889203. The next prime is 155889247. The reversal of 155889225 is 522988551.

It is a happy number.

155889225 is a `hidden beast` number, since 1 + 558 + 8 + 92 + 2 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (155889203) and next prime (155889247).

It is not a de Polignac number, because 155889225 - 2⁸ = 155888969 is a prime.

It is a super-2 number, since 2×155889225² = 48602900942201250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105240 + ... + 106710.

Almost surely, 2^155889225 is an apocalyptic number.

155889225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155889225 is a deficient number, since it is larger than the sum of its proper divisors (132505015).

155889225 is a wasteful number, since it uses less digits than its factorization.

155889225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1636 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 155889225 is about 12485.5606602187. The cubic root of 155889225 is about 538.1938110843.

The spelling of 155889225 in words is "one hundred fifty-five million, eight hundred eighty-nine thousand, two hundred twenty-five".