155323432 has 32 divisors (see below), whose sum is σ = 319838400. Its totient is φ = 70128000.

The previous prime is 155323429. The next prime is 155323463. The reversal of 155323432 is 234323551.

It is a self number, because there is not a number n which added to its sum of digits gives 155323432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7444 + ... + 19132.

It is an arithmetic number, because the mean of its divisors is an integer number (9994950).

Almost surely, 2^155323432 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 155323432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159919200).

155323432 is an abundant number, since it is smaller than the sum of its proper divisors (164514968).

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

155323432 is a wasteful number, since it uses less digits than its factorization.

155323432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11857 (or 11853 counting only the distinct ones).

The product of its digits is 10800, while the sum is 28.

The square root of 155323432 is about 12462.8821706698. The cubic root of 155323432 is about 537.5419049355.

Adding to 155323432 its reverse (234323551), we get a palindrome (389646983).

The spelling of 155323432 in words is "one hundred fifty-five million, three hundred twenty-three thousand, four hundred thirty-two".