155232442 has 16 divisors (see below), whose sum is σ = 237728520. Its totient is φ = 75995712.

The previous prime is 155232439. The next prime is 155232443. The reversal of 155232442 is 244232551.

It can be written as a sum of positive squares in 4 ways, for example, as 77422401 + 77810041 = 8799^2 + 8821^2 .

It is a super-2 number, since 2×155232442² = 48194222098566728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155232442.

It is not an unprimeable number, because it can be changed into a prime (155232443) 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 7 ways as a sum of consecutive naturals, for example, 63784 + ... + 66172.

Almost surely, 2^155232442 is an apocalyptic number.

155232442 is a deficient number, since it is larger than the sum of its proper divisors (82496078).

155232442 is a wasteful number, since it uses less digits than its factorization.

155232442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057.

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

The square root of 155232442 is about 12459.2311961854. The cubic root of 155232442 is about 537.4369186471.

Adding to 155232442 its reverse (244232551), we get a palindrome (399464993).

The spelling of 155232442 in words is "one hundred fifty-five million, two hundred thirty-two thousand, four hundred forty-two".