158100981 has 8 divisors (see below), whose sum is σ = 215703840. Its totient is φ = 102949392.

The previous prime is 158100977. The next prime is 158100989. The reversal of 158100981 is 189001851.

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

It is not a de Polignac number, because 158100981 - 2² = 158100977 is a prime.

It is a super-2 number, since 2×158100981² = 49991840386324722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158100989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612666 + ... + 612923.

It is an arithmetic number, because the mean of its divisors is an integer number (26962980).

Almost surely, 2^158100981 is an apocalyptic number.

It is an amenable number.

158100981 is a deficient number, since it is larger than the sum of its proper divisors (57602859).

158100981 is a wasteful number, since it uses less digits than its factorization.

158100981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225635.

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 158100981 is about 12573.8212568813. The cubic root of 158100981 is about 540.7271650773.

The spelling of 158100981 in words is "one hundred fifty-eight million, one hundred thousand, nine hundred eighty-one".