150531 has 4 divisors (see below), whose sum is σ = 200712. Its totient is φ = 100352.

The previous prime is 150523. The next prime is 150533. The reversal of 150531 is 135051.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 150531 - 2³ = 150523 is a prime.

It is a super-2 number, since 2×150531² = 45319163922, which contains 22 as substring.

It is a D-number.

150531 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 150531.

It is not an unprimeable number, because it can be changed into a prime (150533) 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, 25086 + ... + 25091.

It is an arithmetic number, because the mean of its divisors is an integer number (50178).

2¹⁵⁰⁵³¹ is an apocalyptic number.

150531 is a deficient number, since it is larger than the sum of its proper divisors (50181).

150531 is an equidigital number, since it uses as much as digits as its factorization.

150531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50180.

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 150531 is about 387.9832470610. The cubic root of 150531 is about 53.1955514776.

Adding to 150531 its reverse (135051), we get a palindrome (285582).

The spelling of 150531 in words is "one hundred fifty thousand, five hundred thirty-one".