155225255 has 16 divisors (see below), whose sum is σ = 196801920. Its totient is φ = 117341952.

The previous prime is 155225209. The next prime is 155225263. The reversal of 155225255 is 552522551.

It is a cyclic number.

It is not a de Polignac number, because 155225255 - 2¹² = 155221159 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 4574 + ... + 18203.

It is an arithmetic number, because the mean of its divisors is an integer number (12300120).

Almost surely, 2^155225255 is an apocalyptic number.

155225255 is a deficient number, since it is larger than the sum of its proper divisors (41576665).

155225255 is a wasteful number, since it uses less digits than its factorization.

155225255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22858.

The product of its digits is 25000, while the sum is 32.

The square root of 155225255 is about 12458.9427721617. The cubic root of 155225255 is about 537.4286243785.

The spelling of 155225255 in words is "one hundred fifty-five million, two hundred twenty-five thousand, two hundred fifty-five".