26198251 has 4 divisors (see below), whose sum is σ = 26208952. Its totient is φ = 26187552.

The previous prime is 26198243. The next prime is 26198267. The reversal of 26198251 is 15289162.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26198251 - 2³ = 26198243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26198231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340 + ... + 7246.

It is an arithmetic number, because the mean of its divisors is an integer number (6552238).

Almost surely, 2^26198251 is an apocalyptic number.

26198251 is a deficient number, since it is larger than the sum of its proper divisors (10701).

26198251 is an equidigital number, since it uses as much as digits as its factorization.

26198251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10700.

The product of its digits is 8640, while the sum is 34.

The square root of 26198251 is about 5118.4227062641. The cubic root of 26198251 is about 297.0006726434. Note that the first 3 decimals are identical.

The spelling of 26198251 in words is "twenty-six million, one hundred ninety-eight thousand, two hundred fifty-one".