155222430 has 96 divisors (see below), whose sum is σ = 416785824. Its totient is φ = 36960000.

The previous prime is 155222357. The next prime is 155222447. The reversal of 155222430 is 34222551.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155222430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221080 + ... + 221780.

It is an arithmetic number, because the mean of its divisors is an integer number (4341519).

Almost surely, 2^155222430 is an apocalyptic number.

155222430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155222430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208392912).

155222430 is an abundant number, since it is smaller than the sum of its proper divisors (261563394).

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

155222430 is a wasteful number, since it uses less digits than its factorization.

155222430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155222430 is about 12458.8293992654. The cubic root of 155222430 is about 537.4253640734.

Adding to 155222430 its reverse (34222551), we get a palindrome (189444981).

The spelling of 155222430 in words is "one hundred fifty-five million, two hundred twenty-two thousand, four hundred thirty".