155545452 has 18 divisors (see below), whose sum is σ = 393184428. Its totient is φ = 51848472.

The previous prime is 155545433. The next prime is 155545463. The reversal of 155545452 is 254545551.

155545452 is a `hidden beast` number, since 1 + 5 + 554 + 54 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4320707 = 155545452 / (1 + 5 + 5 + 5 + 4 + 5 + 4 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2160318 + ... + 2160389.

Almost surely, 2^155545452 is an apocalyptic number.

155545452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155545452 is an abundant number, since it is smaller than the sum of its proper divisors (237638976).

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

155545452 is a wasteful number, since it uses less digits than its factorization.

155545452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320717 (or 4320712 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The square root of 155545452 is about 12471.7862393484. The cubic root of 155545452 is about 537.7979045899.

Subtracting 155545452 from its reverse (254545551), we obtain a palindrome (99000099).

The spelling of 155545452 in words is "one hundred fifty-five million, five hundred forty-five thousand, four hundred fifty-two".