155225665 has 16 divisors (see below), whose sum is σ = 214163712. Its totient is φ = 105799104.

The previous prime is 155225659. The next prime is 155225669. The reversal of 155225665 is 566522551.

It is a cyclic number.

It is not a de Polignac number, because 155225665 - 2¹³ = 155217473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155225669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7434 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (13385232).

Almost surely, 2^155225665 is an apocalyptic number.

It is an amenable number.

155225665 is a deficient number, since it is larger than the sum of its proper divisors (58938047).

155225665 is a wasteful number, since it uses less digits than its factorization.

155225665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26736.

The product of its digits is 90000, while the sum is 37.

The square root of 155225665 is about 12458.9592261954. The cubic root of 155225665 is about 537.4290975522.

The spelling of 155225665 in words is "one hundred fifty-five million, two hundred twenty-five thousand, six hundred sixty-five".