26815225 has 12 divisors (see below), whose sum is σ = 33654096. Its totient is φ = 21192080.

The previous prime is 26815223. The next prime is 26815237. The reversal of 26815225 is 52251862.

26815225 = T₄₆ + T₄₇ + ... + T₅₄₃.

It is not a de Polignac number, because 26815225 - 2¹ = 26815223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26815223) 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, 4387 + ... + 8536.

It is an arithmetic number, because the mean of its divisors is an integer number (2804508).

Almost surely, 2^26815225 is an apocalyptic number.

26815225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26815225 is a deficient number, since it is larger than the sum of its proper divisors (6838871).

26815225 is a wasteful number, since it uses less digits than its factorization.

26815225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13016 (or 13011 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 26815225 is about 5178.3419160963. The cubic root of 26815225 is about 299.3140810607.

The spelling of 26815225 in words is "twenty-six million, eight hundred fifteen thousand, two hundred twenty-five".