2201531 has 2 divisors, whose sum is σ = 2201532. Its totient is φ = 2201530.

The previous prime is 2201519. The next prime is 2201533. The reversal of 2201531 is 1351022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201531 is a prime.

It is a super-2 number, since 2×2201531² = 9693477487922, which contains 22 as substring.

Together with 2201533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2201533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100765 + 1100766.

It is an arithmetic number, because the mean of its divisors is an integer number (1100766).

2^2201531 is an apocalyptic number.

2201531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201531 is an equidigital number, since it uses as much as digits as its factorization.

2201531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2201531 is about 1483.7557076554. The cubic root of 2201531 is about 130.0893074697.

Adding to 2201531 its reverse (1351022), we get a palindrome (3552553).

The spelling of 2201531 in words is "two million, two hundred one thousand, five hundred thirty-one".