26280531 has 10 divisors (see below), whose sum is σ = 39258692. Its totient is φ = 17520300.

The previous prime is 26280509. The next prime is 26280533. The reversal of 26280531 is 13508262.

26280531 is a `hidden beast` number, since 2 + 628 + 0 + 5 + 31 = 666.

It is not a de Polignac number, because 26280531 - 2¹⁸ = 26018387 is a prime.

It is a super-2 number, since 2×26280531² = 1381332619283922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26280495 and 26280504.

It is not an unprimeable number, because it can be changed into a prime (26280533) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 162145 + ... + 162306.

Almost surely, 2^26280531 is an apocalyptic number.

26280531 is a deficient number, since it is larger than the sum of its proper divisors (12978161).

26280531 is an equidigital number, since it uses as much as digits as its factorization.

26280531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324463 (or 324454 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 26280531 is about 5126.4540376365. The cubic root of 26280531 is about 297.3112745080.

Adding to 26280531 its reverse (13508262), we get a palindrome (39788793).

The spelling of 26280531 in words is "twenty-six million, two hundred eighty thousand, five hundred thirty-one".