2131533 has 18 divisors (see below), whose sum is σ = 3182634. Its totient is φ = 1374624.

The previous prime is 2131531. The next prime is 2131537. The reversal of 2131533 is 3351312.

2131533 is a `hidden beast` number, since 2 + 131 + 533 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1671849 + 459684 = 1293^2 + 678^2 .

It is not a de Polignac number, because 2131533 - 2¹ = 2131531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131531) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12235 + ... + 12407.

It is an arithmetic number, because the mean of its divisors is an integer number (176813).

2^2131533 is an apocalyptic number.

It is an amenable number.

2131533 is a deficient number, since it is larger than the sum of its proper divisors (1051101).

2131533 is a wasteful number, since it uses less digits than its factorization.

2131533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 213 counting only the distinct ones).

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

The square root of 2131533 is about 1459.9770546142. The cubic root of 2131533 is about 128.6956951993.

Adding to 2131533 its reverse (3351312), we get a palindrome (5482845).

The spelling of 2131533 in words is "two million, one hundred thirty-one thousand, five hundred thirty-three".