155454222 has 64 divisors (see below), whose sum is σ = 410448384. Its totient is φ = 38000640.

The previous prime is 155454193. The next prime is 155454259. The reversal of 155454222 is 222454551.

It is a self number, because there is not a number n which added to its sum of digits gives 155454222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2043 + ... + 17750.

It is an arithmetic number, because the mean of its divisors is an integer number (6413256).

Almost surely, 2^155454222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155454222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205224192).

155454222 is an abundant number, since it is smaller than the sum of its proper divisors (254994162).

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

155454222 is a wasteful number, since it uses less digits than its factorization.

155454222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19833.

The product of its digits is 16000, while the sum is 30.

The square root of 155454222 is about 12468.1282476561. The cubic root of 155454222 is about 537.6927415492.

The spelling of 155454222 in words is "one hundred fifty-five million, four hundred fifty-four thousand, two hundred twenty-two".