26520631 has 2 divisors, whose sum is σ = 26520632. Its totient is φ = 26520630.

The previous prime is 26520619. The next prime is 26520647. The reversal of 26520631 is 13602562.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26520631 is a prime.

It is a super-2 number, since 2×26520631² = 1406687737276322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26520596 and 26520605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26520671) 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, 13260315 + 13260316.

It is an arithmetic number, because the mean of its divisors is an integer number (13260316).

Almost surely, 2^26520631 is an apocalyptic number.

26520631 is a deficient number, since it is larger than the sum of its proper divisors (1).

26520631 is an equidigital number, since it uses as much as digits as its factorization.

26520631 is an odious number, because the sum of its binary digits is odd.

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

The square root of 26520631 is about 5149.8185404925. The cubic root of 26520631 is about 298.2139470776.

The spelling of 26520631 in words is "twenty-six million, five hundred twenty thousand, six hundred thirty-one".