2531626 has 4 divisors (see below), whose sum is σ = 3797442. Its totient is φ = 1265812.

The previous prime is 2531611. The next prime is 2531629. The reversal of 2531626 is 6261352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2405601 + 126025 = 1551^2 + 355^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2531626.

It is not an unprimeable number, because it can be changed into a prime (2531629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632905 + ... + 632908.

2^2531626 is an apocalyptic number.

2531626 is a deficient number, since it is larger than the sum of its proper divisors (1265816).

2531626 is a wasteful number, since it uses less digits than its factorization.

2531626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265815.

The product of its digits is 2160, while the sum is 25.

The square root of 2531626 is about 1591.1084186818. The cubic root of 2531626 is about 136.2907921515.

Adding to 2531626 its reverse (6261352), we get a palindrome (8792978).

The spelling of 2531626 in words is "two million, five hundred thirty-one thousand, six hundred twenty-six".