155222245 has 8 divisors (see below), whose sum is σ = 186341400. Its totient is φ = 124128000.

The previous prime is 155222237. The next prime is 155222251. The reversal of 155222245 is 542222551.

It can be written as a sum of positive squares in 4 ways, for example, as 6723649 + 148498596 = 2593^2 + 12186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155222245 - 2³ = 155222237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12745 + ... + 21745.

It is an arithmetic number, because the mean of its divisors is an integer number (23292675).

Almost surely, 2^155222245 is an apocalyptic number.

It is an amenable number.

155222245 is a deficient number, since it is larger than the sum of its proper divisors (31119155).

155222245 is an equidigital number, since it uses as much as digits as its factorization.

155222245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12455.

The product of its digits is 8000, while the sum is 28.

The square root of 155222245 is about 12458.8219748097. The cubic root of 155222245 is about 537.4251505653.

Adding to 155222245 its reverse (542222551), we get a palindrome (697444796).

The spelling of 155222245 in words is "one hundred fifty-five million, two hundred twenty-two thousand, two hundred forty-five".