155012012 has 12 divisors (see below), whose sum is σ = 274319640. Its totient is φ = 76634976.

The previous prime is 155011999. The next prime is 155012017. The reversal of 155012012 is 210210551.

It is not an unprimeable number, because it can be changed into a prime (155012017) 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, 217358 + ... + 218069.

It is an arithmetic number, because the mean of its divisors is an integer number (22859970).

Almost surely, 2^155012012 is an apocalyptic number.

It is an amenable number.

155012012 is a deficient number, since it is larger than the sum of its proper divisors (119307628).

155012012 is a wasteful number, since it uses less digits than its factorization.

155012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435520 (or 435518 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 155012012 is about 12450.3820021717. The cubic root of 155012012 is about 537.1824114123.

Adding to 155012012 its reverse (210210551), we get a palindrome (365222563).

The spelling of 155012012 in words is "one hundred fifty-five million, twelve thousand, twelve".