155554225 has 6 divisors (see below), whose sum is σ = 192887270. Its totient is φ = 124443360.

The previous prime is 155554213. The next prime is 155554237. The reversal of 155554225 is 522455551.

It is an interprime number because it is at equal distance from previous prime (155554213) and next prime (155554237).

It can be written as a sum of positive squares in 3 ways, for example, as 32809984 + 122744241 = 5728^2 + 11079^2 .

It is not a de Polignac number, because 155554225 - 2¹⁷ = 155423153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3111060 + ... + 3111109.

Almost surely, 2^155554225 is an apocalyptic number.

It is an amenable number.

155554225 is a deficient number, since it is larger than the sum of its proper divisors (37333045).

155554225 is an equidigital number, since it uses as much as digits as its factorization.

155554225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222179 (or 6222174 counting only the distinct ones).

The product of its digits is 50000, while the sum is 34.

The square root of 155554225 is about 12472.1379482429. The cubic root of 155554225 is about 537.8080152730.

The spelling of 155554225 in words is "one hundred fifty-five million, five hundred fifty-four thousand, two hundred twenty-five".