2133631 has 2 divisors, whose sum is σ = 2133632. Its totient is φ = 2133630.

The previous prime is 2133613. The next prime is 2133647. The reversal of 2133631 is 1363312.

Together with previous prime (2133613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2133631 - 2²¹ = 36479 is a prime.

It is a super-2 number, since 2×2133631² = 9104762488322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2³ + 1 + 3⁸ + 3¹² + 6⁴ + 3¹³ + 1 .

2133631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2133599 and 2133608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2133601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066815 + 1066816.

It is an arithmetic number, because the mean of its divisors is an integer number (1066816).

2^2133631 is an apocalyptic number.

2133631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133631 is an equidigital number, since it uses as much as digits as its factorization.

2133631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 2133631 is about 1460.6953823436. The cubic root of 2133631 is about 128.7379050441.

Adding to 2133631 its reverse (1363312), we get a palindrome (3496943).

It can be divided in two parts, 213 and 3631, that added together give a square (3844 = 62²).

The spelling of 2133631 in words is "two million, one hundred thirty-three thousand, six hundred thirty-one".