231550502000505 has 16 divisors (see below), whose sum is σ = 371284449205824. Its totient is φ = 123225719065280.

The previous prime is 231550502000501. The next prime is 231550502000527. The reversal of 231550502000505 is 505000205055132.

It is not a de Polignac number, because 231550502000505 - 2² = 231550502000501 is a prime.

It is a super-3 number, since 3×231550502000505³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (231550502000501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16742617959 + ... + 16742631788.

It is an arithmetic number, because the mean of its divisors is an integer number (23205278075364).

Almost surely, 2^{231550502000505} is an apocalyptic number.

It is an amenable number.

231550502000505 is a deficient number, since it is larger than the sum of its proper divisors (139733947205319).

231550502000505 is a wasteful number, since it uses less digits than its factorization.

231550502000505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33485250216.

The product of its (nonzero) digits is 37500, while the sum is 33.

Adding to 231550502000505 its reverse (505000205055132), we get a palindrome (736550707055637).

The spelling of 231550502000505 in words is "two hundred thirty-one trillion, five hundred fifty billion, five hundred two million, five hundred five", and thus it is an aban number.