31550495549 has 2 divisors, whose sum is σ = 31550495550. Its totient is φ = 31550495548.

The previous prime is 31550495531. The next prime is 31550495563. The reversal of 31550495549 is 94559405513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19988869924 + 11561625625 = 141382^2 + 107525^2 .

It is a cyclic number.

It is not a de Polignac number, because 31550495549 - 2¹⁶ = 31550430013 is a prime.

It is a super-2 number, since 2×31550495549² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31550495497 and 31550495506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31550495569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15775247774 + 15775247775.

It is an arithmetic number, because the mean of its divisors is an integer number (15775247775).

Almost surely, 2^31550495549 is an apocalyptic number.

It is an amenable number.

31550495549 is a deficient number, since it is larger than the sum of its proper divisors (1).

31550495549 is an equidigital number, since it uses as much as digits as its factorization.

31550495549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430000, while the sum is 50.

The spelling of 31550495549 in words is "thirty-one billion, five hundred fifty million, four hundred ninety-five thousand, five hundred forty-nine".