158644212 has 12 divisors (see below), whose sum is σ = 370169856. Its totient is φ = 52881400.

The previous prime is 158644169. The next prime is 158644229. The reversal of 158644212 is 212446851.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×158644212² = 50335972002201888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6610164 + ... + 6610187.

It is an arithmetic number, because the mean of its divisors is an integer number (30847488).

Almost surely, 2^158644212 is an apocalyptic number.

158644212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

158644212 is an abundant number, since it is smaller than the sum of its proper divisors (211525644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158644212 is a wasteful number, since it uses less digits than its factorization.

158644212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13220358 (or 13220356 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 158644212 is about 12595.4044000183. The cubic root of 158644212 is about 541.3457654385.

The spelling of 158644212 in words is "one hundred fifty-eight million, six hundred forty-four thousand, two hundred twelve".