158382226 has 4 divisors (see below), whose sum is σ = 237573342. Its totient is φ = 79191112.

The previous prime is 158382223. The next prime is 158382247. The reversal of 158382226 is 622283851.

It is a Cunningham number, because it is equal to 12585²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622283851 = 7 ⋅88897693.

It can be written as a sum of positive squares in only one way, i.e., 158382225 + 1 = 12585^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (158382223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39595555 + ... + 39595558.

Almost surely, 2^158382226 is an apocalyptic number.

158382226 is a deficient number, since it is larger than the sum of its proper divisors (79191116).

158382226 is an equidigital number, since it uses as much as digits as its factorization.

158382226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79191115.

The product of its digits is 46080, while the sum is 37.

The square root of 158382226 is about 12585.0000397298. Note that the first 4 decimals coincide. The cubic root of 158382226 is about 541.0476073739.

The spelling of 158382226 in words is "one hundred fifty-eight million, three hundred eighty-two thousand, two hundred twenty-six".