155531146 has 8 divisors (see below), whose sum is σ = 234226944. Its totient is φ = 77455500.

The previous prime is 155531143. The next prime is 155531153. The reversal of 155531146 is 641135551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (155531141) 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 3 ways as a sum of consecutive naturals, for example, 154410 + ... + 155413.

It is an arithmetic number, because the mean of its divisors is an integer number (29278368).

Almost surely, 2^155531146 is an apocalyptic number.

155531146 is a deficient number, since it is larger than the sum of its proper divisors (78695798).

155531146 is a wasteful number, since it uses less digits than its factorization.

155531146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310076.

The product of its digits is 9000, while the sum is 31.

The square root of 155531146 is about 12471.2126916351. The cubic root of 155531146 is about 537.7814164346.

Adding to 155531146 its reverse (641135551), we get a palindrome (796666697).

The spelling of 155531146 in words is "one hundred fifty-five million, five hundred thirty-one thousand, one hundred forty-six".