155234420 has 48 divisors (see below), whose sum is σ = 363218688. Its totient is φ = 55244160.

The previous prime is 155234411. The next prime is 155234437. The reversal of 155234420 is 24432551.

It is a happy number.

It is a super-3 number, since 3×155234420³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155234420.

It is a congruent number.

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, 2834 + ... + 17846.

It is an arithmetic number, because the mean of its divisors is an integer number (7567056).

Almost surely, 2^155234420 is an apocalyptic number.

155234420 is a gapful number since it is divisible by the number (10) 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 155234420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181609344).

155234420 is an abundant number, since it is smaller than the sum of its proper divisors (207984268).

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

155234420 is a wasteful number, since it uses less digits than its factorization.

155234420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080 (or 15078 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 155234420 is about 12459.3105748272. The cubic root of 155234420 is about 537.4392013438.

Adding to 155234420 its reverse (24432551), we get a palindrome (179666971).

The spelling of 155234420 in words is "one hundred fifty-five million, two hundred thirty-four thousand, four hundred twenty".