158533281 has 15 divisors (see below), whose sum is σ = 236990721. Its totient is φ = 105613308.

The previous prime is 158533261. The next prime is 158533289. The reversal of 158533281 is 182335851.

The square root of 158533281 is 12591.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 158533281 - 2¹⁹ = 158008993 is a prime.

It is a super-2 number, since 2×158533281² = 50265602369249922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158533289) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 112620 + ... + 114018.

Almost surely, 2^158533281 is an apocalyptic number.

158533281 is the 12591-st square number.

158533281 is the 6296-th centered octagonal number.

It is an amenable number.

158533281 is a deficient number, since it is larger than the sum of its proper divisors (78457440).

158533281 is an frugal number, since it uses more digits than its factorization.

158533281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 1402 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The cubic root of 158533281 is about 541.2195584399.

Multiplying 158533281 by its sum of digits (36), we get a square (5707198116 = 75546²).

The spelling of 158533281 in words is "one hundred fifty-eight million, five hundred thirty-three thousand, two hundred eighty-one".