155015012 has 12 divisors (see below), whose sum is σ = 271591740. Its totient is φ = 77417376.

The previous prime is 155015011. The next prime is 155015039. The reversal of 155015012 is 210510551.

It is a happy number.

155015012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 53085796 + 101929216 = 7286^2 + 10096^2 .

It is not an unprimeable number, because it can be changed into a prime (155015011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18587 + ... + 25602.

It is an arithmetic number, because the mean of its divisors is an integer number (22632645).

Almost surely, 2^155015012 is an apocalyptic number.

It is an amenable number.

155015012 is a deficient number, since it is larger than the sum of its proper divisors (116576728).

155015012 is a wasteful number, since it uses less digits than its factorization.

155015012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45070 (or 45068 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 155015012 is about 12450.5024798198. The cubic root of 155015012 is about 537.1858768143.

Adding to 155015012 its reverse (210510551), we get a palindrome (365525563).

The spelling of 155015012 in words is "one hundred fifty-five million, fifteen thousand, twelve".