31515014149 has 2 divisors, whose sum is σ = 31515014150. Its totient is φ = 31515014148.

The previous prime is 31515014119. The next prime is 31515014231. The reversal of 31515014149 is 94141051513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23572996225 + 7942017924 = 153535^2 + 89118^2 .

It is a cyclic number.

It is not a de Polignac number, because 31515014149 - 2⁵ = 31515014117 is a prime.

It is a super-2 number, since 2×31515014149² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31515014119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15757507074 + 15757507075.

It is an arithmetic number, because the mean of its divisors is an integer number (15757507075).

Almost surely, 2^31515014149 is an apocalyptic number.

It is an amenable number.

31515014149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31515014149 is an equidigital number, since it uses as much as digits as its factorization.

31515014149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 31515014149 in words is "thirty-one billion, five hundred fifteen million, fourteen thousand, one hundred forty-nine".