231655503225 has 24 divisors (see below), whose sum is σ = 392345325792. Its totient is φ = 120536195200.

The previous prime is 231655503181. The next prime is 231655503227. The reversal of 231655503225 is 522305556132.

It is a happy number.

It is not a de Polignac number, because 231655503225 - 2¹³ = 231655495033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231655503227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37664487 + ... + 37670636.

It is an arithmetic number, because the mean of its divisors is an integer number (16347721908).

Almost surely, 2^231655503225 is an apocalyptic number.

231655503225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231655503225 is a deficient number, since it is larger than the sum of its proper divisors (160689822567).

231655503225 is a wasteful number, since it uses less digits than its factorization.

231655503225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75335177 (or 75335172 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 39.

The spelling of 231655503225 in words is "two hundred thirty-one billion, six hundred fifty-five million, five hundred three thousand, two hundred twenty-five".