155543472 has 240 divisors, whose sum is σ = 546661440. Its totient is φ = 40255488.

The previous prime is 155543471. The next prime is 155543497. The reversal of 155543472 is 274345551.

155543472 is a `hidden beast` number, since 1 + 5 + 554 + 34 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (155543471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 496788 + ... + 497100.

It is an arithmetic number, because the mean of its divisors is an integer number (2277756).

Almost surely, 2^155543472 is an apocalyptic number.

155543472 is a gapful number since it is divisible by the number (12) 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 155543472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273330720).

155543472 is an abundant number, since it is smaller than the sum of its proper divisors (391117968).

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

155543472 is a wasteful number, since it uses less digits than its factorization.

155543472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 371 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 155543472 is about 12471.7068599290. The cubic root of 155543472 is about 537.7956226323.

The spelling of 155543472 in words is "one hundred fifty-five million, five hundred forty-three thousand, four hundred seventy-two".