231242200140431 has 4 divisors (see below), whose sum is σ = 231632153260992. Its totient is φ = 230852247019872.

The previous prime is 231242200140373. The next prime is 231242200140437. The reversal of 231242200140431 is 134041002242132.

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 231242200140431 - 2⁴⁶ = 160873455962767 is a prime.

It is a super-2 number, since 2×231242200140431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231242200140394 and 231242200140403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231242200140437) 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, 194976559391 + ... + 194976560576.

It is an arithmetic number, because the mean of its divisors is an integer number (57908038315248).

Almost surely, 2^{231242200140431} is an apocalyptic number.

231242200140431 is a deficient number, since it is larger than the sum of its proper divisors (389953120561).

231242200140431 is an equidigital number, since it uses as much as digits as its factorization.

231242200140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389953120560.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 231242200140431 its reverse (134041002242132), we get a palindrome (365283202382563).

The spelling of 231242200140431 in words is "two hundred thirty-one trillion, two hundred forty-two billion, two hundred million, one hundred forty thousand, four hundred thirty-one".