153531 has 12 divisors (see below), whose sum is σ = 253552. Its totient is φ = 87696.

The previous prime is 153529. The next prime is 153533. The reversal of 153531 is 135351.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (153529) and next prime (153533).

It is not a de Polignac number, because 153531 - 2¹ = 153529 is a prime.

It is a super-2 number, since 2×153531² = 47143535922, which contains 22 as substring.

It is a Duffinian number.

153531 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153533) 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, 1156 + ... + 1281.

2¹⁵³⁵³¹ is an apocalyptic number.

153531 is a deficient number, since it is larger than the sum of its proper divisors (100021).

153531 is a wasteful number, since it uses less digits than its factorization.

153531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450 (or 2447 counting only the distinct ones).

The product of its digits is 225, while the sum is 18.

The square root of 153531 is about 391.8303204194. The cubic root of 153531 is about 53.5466155566.

Adding to 153531 its reverse (135351), we get a palindrome (288882).

The spelling of 153531 in words is "one hundred fifty-three thousand, five hundred thirty-one".