158256631 has 8 divisors (see below), whose sum is σ = 173225024. Its totient is φ = 143687520.

The previous prime is 158256619. The next prime is 158256649. The reversal of 158256631 is 136652851.

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 158256631 - 2⁷ = 158256503 is a prime.

It is a super-2 number, since 2×158256631² = 50090322510940322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158256731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98991 + ... + 100576.

It is an arithmetic number, because the mean of its divisors is an integer number (21653128).

Almost surely, 2^158256631 is an apocalyptic number.

158256631 is a deficient number, since it is larger than the sum of its proper divisors (14968393).

158256631 is a wasteful number, since it uses less digits than its factorization.

158256631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199641.

The product of its digits is 43200, while the sum is 37.

The square root of 158256631 is about 12580.0091812367. The cubic root of 158256631 is about 540.9045550340.

The spelling of 158256631 in words is "one hundred fifty-eight million, two hundred fifty-six thousand, six hundred thirty-one".