155222203 has 4 divisors (see below), whose sum is σ = 155254320. Its totient is φ = 155190088.

The previous prime is 155222173. The next prime is 155222237. The reversal of 155222203 is 302222551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302222551 = 89 ⋅3395759.

It is a cyclic number.

It is not a de Polignac number, because 155222203 - 2²⁵ = 121667771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155223203) 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, 7168 + ... + 19021.

It is an arithmetic number, because the mean of its divisors is an integer number (38813580).

Almost surely, 2^155222203 is an apocalyptic number.

155222203 is a deficient number, since it is larger than the sum of its proper divisors (32117).

155222203 is an equidigital number, since it uses as much as digits as its factorization.

155222203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32116.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 155222203 is about 12458.8202892569. The cubic root of 155222203 is about 537.4251020931.

Adding to 155222203 its reverse (302222551), we get a palindrome (457444754).

The spelling of 155222203 in words is "one hundred fifty-five million, two hundred twenty-two thousand, two hundred three".