231140502602551 has 4 divisors (see below), whose sum is σ = 231213440599600. Its totient is φ = 231067564605504.

The previous prime is 231140502602539. The next prime is 231140502602591. The reversal of 231140502602551 is 155206205041132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231140502602551 - 2¹⁵ = 231140502569783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231140502602551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231140502602591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36468993771 + ... + 36469000108.

It is an arithmetic number, because the mean of its divisors is an integer number (57803360149900).

Almost surely, 2^{231140502602551} is an apocalyptic number.

231140502602551 is a deficient number, since it is larger than the sum of its proper divisors (72937997049).

231140502602551 is an equidigital number, since it uses as much as digits as its factorization.

231140502602551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72937997048.

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

Adding to 231140502602551 its reverse (155206205041132), we get a palindrome (386346707643683).

The spelling of 231140502602551 in words is "two hundred thirty-one trillion, one hundred forty billion, five hundred two million, six hundred two thousand, five hundred fifty-one".