158555331 has 12 divisors (see below), whose sum is σ = 249844920. Its totient is φ = 96094080.

The previous prime is 158555329. The next prime is 158555363. The reversal of 158555331 is 133555851.

It is not a de Polignac number, because 158555331 - 2¹ = 158555329 is a prime.

It is a super-2 number, since 2×158555331² = 50279585977039122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (158555321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 800686 + ... + 800883.

It is an arithmetic number, because the mean of its divisors is an integer number (20820410).

Almost surely, 2^158555331 is an apocalyptic number.

158555331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

158555331 is a deficient number, since it is larger than the sum of its proper divisors (91289589).

158555331 is a wasteful number, since it uses less digits than its factorization.

158555331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601586 (or 1601583 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 158555331 is about 12591.8755950017. The cubic root of 158555331 is about 541.2446495710.

The spelling of 158555331 in words is "one hundred fifty-eight million, five hundred fifty-five thousand, three hundred thirty-one".