150581 has 4 divisors (see below), whose sum is σ = 157152. Its totient is φ = 144012.

The previous prime is 150571. The next prime is 150583. The reversal of 150581 is 185051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 150581 - 2⁶ = 150517 is a prime.

It is a super-2 number, since 2×150581² = 45349275122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 150581.

It is not an unprimeable number, because it can be changed into a prime (150583) 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, 3251 + ... + 3296.

It is an arithmetic number, because the mean of its divisors is an integer number (39288).

2¹⁵⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

150581 is a deficient number, since it is larger than the sum of its proper divisors (6571).

150581 is an equidigital number, since it uses as much as digits as its factorization.

150581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6570.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 150581 is about 388.0476774831. The cubic root of 150581 is about 53.2014405926.

The spelling of 150581 in words is "one hundred fifty thousand, five hundred eighty-one".