158171212 has 12 divisors (see below), whose sum is σ = 281491560. Its totient is φ = 77745056.

The previous prime is 158171201. The next prime is 158171291. The reversal of 158171212 is 212171851.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 334873 + ... + 335344.

It is an arithmetic number, because the mean of its divisors is an integer number (23457630).

Almost surely, 2^158171212 is an apocalyptic number.

It is an amenable number.

158171212 is a deficient number, since it is larger than the sum of its proper divisors (123320348).

158171212 is a wasteful number, since it uses less digits than its factorization.

158171212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670280 (or 670278 counting only the distinct ones).

The product of its digits is 1120, while the sum is 28.

The square root of 158171212 is about 12576.6136936776. The cubic root of 158171212 is about 540.8072197941.

The spelling of 158171212 in words is "one hundred fifty-eight million, one hundred seventy-one thousand, two hundred twelve".