42131543149 has 2 divisors, whose sum is σ = 42131543150. Its totient is φ = 42131543148.

The previous prime is 42131543131. The next prime is 42131543161. The reversal of 42131543149 is 94134513124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39057616900 + 3073926249 = 197630^2 + 55443^2 .

It is a cyclic number.

It is not a de Polignac number, because 42131543149 - 2²⁵ = 42097988717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42131543249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065771574 + 21065771575.

It is an arithmetic number, because the mean of its divisors is an integer number (21065771575).

Almost surely, 2^42131543149 is an apocalyptic number.

It is an amenable number.

42131543149 is a deficient number, since it is larger than the sum of its proper divisors (1).

42131543149 is an equidigital number, since it uses as much as digits as its factorization.

42131543149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

It can be divided in two parts, 421315 and 43149, that added together give a palindrome (464464).

The spelling of 42131543149 in words is "forty-two billion, one hundred thirty-one million, five hundred forty-three thousand, one hundred forty-nine".