158131445 has 8 divisors (see below), whose sum is σ = 190043736. Its totient is φ = 126314496.

The previous prime is 158131439. The next prime is 158131483. The reversal of 158131445 is 544131851.

It can be written as a sum of positive squares in 4 ways, for example, as 528529 + 157602916 = 727^2 + 12554^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158131445 - 2⁴ = 158131429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20132 + ... + 26861.

It is an arithmetic number, because the mean of its divisors is an integer number (23755467).

Almost surely, 2^158131445 is an apocalyptic number.

It is an amenable number.

158131445 is a deficient number, since it is larger than the sum of its proper divisors (31912291).

158131445 is an equidigital number, since it uses as much as digits as its factorization.

158131445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47671.

The product of its digits is 9600, while the sum is 32.

The square root of 158131445 is about 12575.0326043315. The cubic root of 158131445 is about 540.7618932077.

The spelling of 158131445 in words is "one hundred fifty-eight million, one hundred thirty-one thousand, four hundred forty-five".