158216897 has 4 divisors (see below), whose sum is σ = 160445376. Its totient is φ = 155988420.

The previous prime is 158216893. The next prime is 158216983. The reversal of 158216897 is 798612851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 158216897 - 2² = 158216893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158216893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114133 + ... + 1114274.

It is an arithmetic number, because the mean of its divisors is an integer number (40111344).

Almost surely, 2^158216897 is an apocalyptic number.

It is an amenable number.

158216897 is a deficient number, since it is larger than the sum of its proper divisors (2228479).

158216897 is an equidigital number, since it uses as much as digits as its factorization.

158216897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228478.

The product of its digits is 241920, while the sum is 47.

The square root of 158216897 is about 12578.4298304677. The cubic root of 158216897 is about 540.8592823643.

The spelling of 158216897 in words is "one hundred fifty-eight million, two hundred sixteen thousand, eight hundred ninety-seven".