2531537 has 2 divisors, whose sum is σ = 2531538. Its totient is φ = 2531536.

The previous prime is 2531533. The next prime is 2531549. The reversal of 2531537 is 7351352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2531281 + 256 = 1591^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531537 - 2² = 2531533 is a prime.

It is not a weakly prime, because it can be changed into another prime (2531533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265768 + 1265769.

It is an arithmetic number, because the mean of its divisors is an integer number (1265769).

2^2531537 is an apocalyptic number.

It is an amenable number.

2531537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531537 is an equidigital number, since it uses as much as digits as its factorization.

2531537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 26.

The square root of 2531537 is about 1591.0804505115. The cubic root of 2531537 is about 136.2891950195.

Adding to 2531537 its reverse (7351352), we get a palindrome (9882889).

It can be divided in two parts, 25315 and 37, that added together give a palindrome (25352).

The spelling of 2531537 in words is "two million, five hundred thirty-one thousand, five hundred thirty-seven".