31355438141 has 2 divisors, whose sum is σ = 31355438142. Its totient is φ = 31355438140.

The previous prime is 31355438099. The next prime is 31355438171. The reversal of 31355438141 is 14183455313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30670516900 + 684921241 = 175130^2 + 26171^2 .

It is an emirp because it is prime and its reverse (14183455313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31355438141 - 2¹⁰ = 31355437117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31355438095 and 31355438104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31355438171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15677719070 + 15677719071.

It is an arithmetic number, because the mean of its divisors is an integer number (15677719071).

Almost surely, 2^31355438141 is an apocalyptic number.

It is an amenable number.

31355438141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31355438141 is an equidigital number, since it uses as much as digits as its factorization.

31355438141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The spelling of 31355438141 in words is "thirty-one billion, three hundred fifty-five million, four hundred thirty-eight thousand, one hundred forty-one".