231137475311711 has 4 divisors (see below), whose sum is σ = 231659230335432. Its totient is φ = 230615720287992.

The previous prime is 231137475311683. The next prime is 231137475311767. The reversal of 231137475311711 is 117113574731132.

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 231137475311711 - 2¹⁸ = 231137475049567 is a prime.

It is a super-2 number, since 2×231137475311711² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231137475311791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260877511196 + ... + 260877512081.

It is an arithmetic number, because the mean of its divisors is an integer number (57914807583858).

Almost surely, 2^{231137475311711} is an apocalyptic number.

231137475311711 is a deficient number, since it is larger than the sum of its proper divisors (521755023721).

231137475311711 is an equidigital number, since it uses as much as digits as its factorization.

231137475311711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521755023720.

The product of its digits is 370440, while the sum is 47.

The spelling of 231137475311711 in words is "two hundred thirty-one trillion, one hundred thirty-seven billion, four hundred seventy-five million, three hundred eleven thousand, seven hundred eleven".