155522222 has 8 divisors (see below), whose sum is σ = 247005936. Its totient is φ = 73186912.

The previous prime is 155522221. The next prime is 155522231. The reversal of 155522222 is 222225551.

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

It is a junction number, because it is equal to n+sod(n) for n = 155522191 and 155522200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155522221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2287058 + ... + 2287125.

It is an arithmetic number, because the mean of its divisors is an integer number (30875742).

Almost surely, 2^155522222 is an apocalyptic number.

155522222 is a deficient number, since it is larger than the sum of its proper divisors (91483714).

155522222 is a wasteful number, since it uses less digits than its factorization.

155522222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574202.

The product of its digits is 4000, while the sum is 26.

The square root of 155522222 is about 12470.8549025317. The cubic root of 155522222 is about 537.7711307067.

Adding to 155522222 its reverse (222225551), we get a palindrome (377747773).

The spelling of 155522222 in words is "one hundred fifty-five million, five hundred twenty-two thousand, two hundred twenty-two".