26557231 has 12 divisors (see below), whose sum is σ = 28759080. Its totient is φ = 24455520.

The previous prime is 26557207. The next prime is 26557241. The reversal of 26557231 is 13275562.

It is not a de Polignac number, because 26557231 - 2⁵ = 26557199 is a prime.

It is a super-2 number, since 2×26557231² = 1410573036774722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26557193 and 26557202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26557241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25501 + ... + 26521.

It is an arithmetic number, because the mean of its divisors is an integer number (2396590).

Almost surely, 2^26557231 is an apocalyptic number.

26557231 is a deficient number, since it is larger than the sum of its proper divisors (2201849).

26557231 is a wasteful number, since it uses less digits than its factorization.

26557231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1077 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 26557231 is about 5153.3708385871. The cubic root of 26557231 is about 298.3510681660.

The spelling of 26557231 in words is "twenty-six million, five hundred fifty-seven thousand, two hundred thirty-one".