155223236 has 48 divisors (see below), whose sum is σ = 328258560. Its totient is φ = 62739360.

The previous prime is 155223227. The next prime is 155223259. The reversal of 155223236 is 632322551.

It is a junction number, because it is equal to n+sod(n) for n = 155223199 and 155223208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150041 + ... + 151071.

It is an arithmetic number, because the mean of its divisors is an integer number (6838720).

Almost surely, 2^155223236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155223236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164129280).

155223236 is an abundant number, since it is smaller than the sum of its proper divisors (173035324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155223236 is a wasteful number, since it uses less digits than its factorization.

155223236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 155223236 is about 12458.8617457615. The cubic root of 155223236 is about 537.4262942742.

Adding to 155223236 its reverse (632322551), we get a palindrome (787545787).

The spelling of 155223236 in words is "one hundred fifty-five million, two hundred twenty-three thousand, two hundred thirty-six".