155015424 has 144 divisors (see below), whose sum is σ = 470447040. Its totient is φ = 50319360.

The previous prime is 155015389. The next prime is 155015429. The reversal of 155015424 is 424510551.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is not an unprimeable number, because it can be changed into a prime (155015429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283119 + ... + 283665.

Almost surely, 2^155015424 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 155015424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235223520).

155015424 is an abundant number, since it is smaller than the sum of its proper divisors (315431616).

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

155015424 is an equidigital number, since it uses as much as digits as its factorization.

155015424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 155015424 is about 12450.5190253258. The cubic root of 155015424 is about 537.1863527261.

Adding to 155015424 its reverse (424510551), we get a palindrome (579525975).

The spelling of 155015424 in words is "one hundred fifty-five million, fifteen thousand, four hundred twenty-four".