155222424 has 96 divisors (see below), whose sum is σ = 484323840. Its totient is φ = 43992000.

The previous prime is 155222357. The next prime is 155222447. The reversal of 155222424 is 424222551.

155222424 is a `hidden beast` number, since 15 + 5 + 222 + 424 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64849 + ... + 67199.

It is an arithmetic number, because the mean of its divisors is an integer number (5045040).

Almost surely, 2^155222424 is an apocalyptic number.

155222424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155222424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242161920).

155222424 is an abundant number, since it is smaller than the sum of its proper divisors (329101416).

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

155222424 is a wasteful number, since it uses less digits than its factorization.

155222424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501 (or 2494 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 155222424 is about 12458.8291584723. The cubic root of 155222424 is about 537.4253571488.

Adding to 155222424 its reverse (424222551), we get a palindrome (579444975).

The spelling of 155222424 in words is "one hundred fifty-five million, two hundred twenty-two thousand, four hundred twenty-four".