155223199 has 4 divisors (see below), whose sum is σ = 155263680. Its totient is φ = 155182720.

The previous prime is 155223161. The next prime is 155223203. The reversal of 155223199 is 991322551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991322551 = 1777 ⋅557863.

It is a cyclic number.

It is not a de Polignac number, because 155223199 - 2²³ = 146834591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155223119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13807 + ... + 22384.

It is an arithmetic number, because the mean of its divisors is an integer number (38815920).

Almost surely, 2^155223199 is an apocalyptic number.

155223199 is a deficient number, since it is larger than the sum of its proper divisors (40481).

155223199 is an equidigital number, since it uses as much as digits as its factorization.

155223199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40480.

The product of its digits is 24300, while the sum is 37.

The square root of 155223199 is about 12458.8602608746. The cubic root of 155223199 is about 537.4262515727.

It can be divided in two parts, 15522 and 3199, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 155223199 in words is "one hundred fifty-five million, two hundred twenty-three thousand, one hundred ninety-nine".