158217916 has 6 divisors (see below), whose sum is σ = 276881360. Its totient is φ = 79108956.

The previous prime is 158217901. The next prime is 158217931. The reversal of 158217916 is 619712851.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (158217901) and next prime (158217931).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19777236 + ... + 19777243.

Almost surely, 2^158217916 is an apocalyptic number.

It is an amenable number.

158217916 is a deficient number, since it is larger than the sum of its proper divisors (118663444).

158217916 is a wasteful number, since it uses less digits than its factorization.

158217916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39554483 (or 39554481 counting only the distinct ones).

The product of its digits is 30240, while the sum is 40.

The square root of 158217916 is about 12578.4703362531. The cubic root of 158217916 is about 540.8604435012.

The spelling of 158217916 in words is "one hundred fifty-eight million, two hundred seventeen thousand, nine hundred sixteen".