155222234 has 4 divisors (see below), whose sum is σ = 232833354. Its totient is φ = 77611116.

The previous prime is 155222173. The next prime is 155222237. The reversal of 155222234 is 432222551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432222551 = 151 ⋅2862401.

It can be written as a sum of positive squares in only one way, i.e., 97081609 + 58140625 = 9853^2 + 7625^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155222237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38805557 + ... + 38805560.

Almost surely, 2^155222234 is an apocalyptic number.

155222234 is a deficient number, since it is larger than the sum of its proper divisors (77611120).

155222234 is an equidigital number, since it uses as much as digits as its factorization.

155222234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77611119.

The product of its digits is 4800, while the sum is 26.

The square root of 155222234 is about 12458.8215333554. The cubic root of 155222234 is about 537.4251378702.

Adding to 155222234 its reverse (432222551), we get a palindrome (587444785).

The spelling of 155222234 in words is "one hundred fifty-five million, two hundred twenty-two thousand, two hundred thirty-four".