158181307 has 4 divisors (see below), whose sum is σ = 158331456. Its totient is φ = 158031160.

The previous prime is 158181271. The next prime is 158181337. The reversal of 158181307 is 703181851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703181851 = 107 ⋅6571793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158181307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158181337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73483 + ... + 75604.

It is an arithmetic number, because the mean of its divisors is an integer number (39582864).

Almost surely, 2^158181307 is an apocalyptic number.

158181307 is a deficient number, since it is larger than the sum of its proper divisors (150149).

158181307 is a wasteful number, since it uses less digits than its factorization.

158181307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150148.

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 158181307 is about 12577.0150274220. The cubic root of 158181307 is about 540.8187249065.

The spelling of 158181307 in words is "one hundred fifty-eight million, one hundred eighty-one thousand, three hundred seven".