231533533152505 has 16 divisors (see below), whose sum is σ = 280175808162240. Its totient is φ = 183674911238208.

The previous prime is 231533533152479. The next prime is 231533533152521. The reversal of 231533533152505 is 505251335335132.

It is a cyclic number.

It is not a de Polignac number, because 231533533152505 - 2¹³ = 231533533144313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320282550 + ... + 321004639.

It is an arithmetic number, because the mean of its divisors is an integer number (17510988010140).

Almost surely, 2^{231533533152505} is an apocalyptic number.

It is an amenable number.

231533533152505 is a deficient number, since it is larger than the sum of its proper divisors (48642275009735).

231533533152505 is a wasteful number, since it uses less digits than its factorization.

231533533152505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641287800.

The product of its (nonzero) digits is 3037500, while the sum is 46.

Adding to 231533533152505 its reverse (505251335335132), we get a palindrome (736784868487637).

The spelling of 231533533152505 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-three million, one hundred fifty-two thousand, five hundred five".