136218025 has 12 divisors (see below), whose sum is σ = 178846812. Its totient is φ = 102563840.

The previous prime is 136218001. The next prime is 136218037. The reversal of 136218025 is 520812631.

It can be written as a sum of positive squares in 6 ways, for example, as 2399401 + 133818624 = 1549^2 + 11568^2 .

It is not a de Polignac number, because 136218025 - 2⁹ = 136217513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136217984 and 136218002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159832 + ... + 160681.

It is an arithmetic number, because the mean of its divisors is an integer number (14903901).

Almost surely, 2^136218025 is an apocalyptic number.

It is an amenable number.

136218025 is a deficient number, since it is larger than the sum of its proper divisors (42628787).

136218025 is a wasteful number, since it uses less digits than its factorization.

136218025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320540 (or 320535 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 136218025 is about 11671.2477910462. The cubic root of 136218025 is about 514.5309771330.

The spelling of 136218025 in words is "one hundred thirty-six million, two hundred eighteen thousand, twenty-five".