231120432157 has 2 divisors, whose sum is σ = 231120432158. Its totient is φ = 231120432156.

The previous prime is 231120432131. The next prime is 231120432227. The reversal of 231120432157 is 751234021132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222506550436 + 8613881721 = 471706^2 + 92811^2 .

It is a cyclic number.

It is not a de Polignac number, because 231120432157 - 2¹¹ = 231120430109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231120432457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560216078 + 115560216079.

It is an arithmetic number, because the mean of its divisors is an integer number (115560216079).

Almost surely, 2^231120432157 is an apocalyptic number.

It is an amenable number.

231120432157 is a deficient number, since it is larger than the sum of its proper divisors (1).

231120432157 is an equidigital number, since it uses as much as digits as its factorization.

231120432157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 231120432157 its reverse (751234021132), we get a palindrome (982354453289).

The spelling of 231120432157 in words is "two hundred thirty-one billion, one hundred twenty million, four hundred thirty-two thousand, one hundred fifty-seven".