155730226 has 8 divisors (see below), whose sum is σ = 235142784. Its totient is φ = 77349300.

The previous prime is 155730221. The next prime is 155730227. The reversal of 155730226 is 622037551.

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

It is a super-2 number, since 2×155730226² = 48503806580022152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155730221) 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, 257530 + ... + 258133.

It is an arithmetic number, because the mean of its divisors is an integer number (29392848).

Almost surely, 2^155730226 is an apocalyptic number.

155730226 is a deficient number, since it is larger than the sum of its proper divisors (79412558).

155730226 is a wasteful number, since it uses less digits than its factorization.

155730226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515816.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 155730226 is about 12479.1917206204. The cubic root of 155730226 is about 538.0107721617.

Adding to 155730226 its reverse (622037551), we get a palindrome (777767777).

The spelling of 155730226 in words is "one hundred fifty-five million, seven hundred thirty thousand, two hundred twenty-six".