155403424 has 48 divisors (see below), whose sum is σ = 336117600. Its totient is φ = 70140160.

The previous prime is 155403421. The next prime is 155403427. The reversal of 155403424 is 424304551.

It is an interprime number because it is at equal distance from previous prime (155403421) and next prime (155403427).

It is a junction number, because it is equal to n+sod(n) for n = 155403392 and 155403401.

It is not an unprimeable number, because it can be changed into a prime (155403421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50967 + ... + 53929.

It is an arithmetic number, because the mean of its divisors is an integer number (7002450).

Almost surely, 2^155403424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155403424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168058800).

155403424 is an abundant number, since it is smaller than the sum of its proper divisors (180714176).

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

155403424 is a wasteful number, since it uses less digits than its factorization.

155403424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133 (or 3125 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 155403424 is about 12466.0909670995. The cubic root of 155403424 is about 537.6341676248.

Adding to 155403424 its reverse (424304551), we get a palindrome (579707975).

The spelling of 155403424 in words is "one hundred fifty-five million, four hundred three thousand, four hundred twenty-four".