265552138 has 16 divisors (see below), whose sum is σ = 435366144. Its totient is φ = 120934080.

The previous prime is 265552127. The next prime is 265552139. The reversal of 265552138 is 831255562.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 265552097 and 265552106.

It is not an unprimeable number, because it can be changed into a prime (265552139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124920 + ... + 127027.

It is an arithmetic number, because the mean of its divisors is an integer number (27210384).

Almost surely, 2^265552138 is an apocalyptic number.

265552138 is a deficient number, since it is larger than the sum of its proper divisors (169814006).

265552138 is a wasteful number, since it uses less digits than its factorization.

265552138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251997.

The product of its digits is 72000, while the sum is 37.

The square root of 265552138 is about 16295.7705555767. The cubic root of 265552138 is about 642.7616162208.

The spelling of 265552138 in words is "two hundred sixty-five million, five hundred fifty-two thousand, one hundred thirty-eight".