2133531 has 24 divisors (see below), whose sum is σ = 3260400. Its totient is φ = 1342656.

The previous prime is 2133487. The next prime is 2133533. The reversal of 2133531 is 1353312.

2133531 is a `hidden beast` number, since 2 + 133 + 531 = 666.

It is not a de Polignac number, because 2133531 - 2⁷ = 2133403 is a prime.

It is a super-2 number, since 2×2133531² = 9103909055922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2133533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14245 + ... + 14393.

It is an arithmetic number, because the mean of its divisors is an integer number (135850).

2^2133531 is an apocalyptic number.

2133531 is a deficient number, since it is larger than the sum of its proper divisors (1126869).

2133531 is a wasteful number, since it uses less digits than its factorization.

2133531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 232 counting only the distinct ones).

The product of its digits is 270, while the sum is 18.

The square root of 2133531 is about 1460.6611516707. The cubic root of 2133531 is about 128.7358937635.

Adding to 2133531 its reverse (1353312), we get a palindrome (3486843).

The spelling of 2133531 in words is "two million, one hundred thirty-three thousand, five hundred thirty-one".