2122531 has 2 divisors, whose sum is σ = 2122532. Its totient is φ = 2122530.

The previous prime is 2122513. The next prime is 2122553. The reversal of 2122531 is 1352212.

Together with previous prime (2122513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2122531 - 2⁵ = 2122499 is a prime.

It is a super-4 number, since 4×2122531⁴ (a number of 26 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2122511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061265 + 1061266.

It is an arithmetic number, because the mean of its divisors is an integer number (1061266).

2^2122531 is an apocalyptic number.

2122531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122531 is an equidigital number, since it uses as much as digits as its factorization.

2122531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 16.

The square root of 2122531 is about 1456.8908675670. The cubic root of 2122531 is about 128.5142681245.

Adding to 2122531 its reverse (1352212), we get a palindrome (3474743).

The spelling of 2122531 in words is "two million, one hundred twenty-two thousand, five hundred thirty-one".