26251531 has 2 divisors, whose sum is σ = 26251532. Its totient is φ = 26251530.

The previous prime is 26251523. The next prime is 26251549. The reversal of 26251531 is 13515262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26251531 - 2³ = 26251523 is a prime.

It is a super-2 number, since 2×26251531² = 1378285759687922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26251496 and 26251505.

It is not a weakly prime, because it can be changed into another prime (26251571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13125765 + 13125766.

It is an arithmetic number, because the mean of its divisors is an integer number (13125766).

Almost surely, 2^26251531 is an apocalyptic number.

26251531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26251531 is an equidigital number, since it uses as much as digits as its factorization.

26251531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 26251531 is about 5123.6247911025. The cubic root of 26251531 is about 297.2018753954.

Adding to 26251531 its reverse (13515262), we get a palindrome (39766793).

The spelling of 26251531 in words is "twenty-six million, two hundred fifty-one thousand, five hundred thirty-one".