155144430 has 256 divisors, whose sum is σ = 510935040. Its totient is φ = 32731776.

The previous prime is 155144399. The next prime is 155144447. The reversal of 155144430 is 34441551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 155144394 and 155144403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1869169 + ... + 1869251.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^155144430 is an apocalyptic number.

155144430 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 155144430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255467520).

155144430 is an abundant number, since it is smaller than the sum of its proper divisors (355790610).

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

155144430 is a wasteful number, since it uses less digits than its factorization.

155144430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 155144430 is about 12455.6986957778. The cubic root of 155144430 is about 537.3353294010.

Adding to 155144430 its reverse (34441551), we get a palindrome (189585981).

The spelling of 155144430 in words is "one hundred fifty-five million, one hundred forty-four thousand, four hundred thirty".