31719335949 has 48 divisors (see below), whose sum is σ = 54670816512. Its totient is φ = 17327084544.

The previous prime is 31719335941. The next prime is 31719335953. The reversal of 31719335949 is 94953391713.

It is a happy number.

31719335949 is a `hidden beast` number, since 3 + 1 + 7 + 19 + 33 + 594 + 9 = 666.

It is not a de Polignac number, because 31719335949 - 2³ = 31719335941 is a prime.

It is a super-2 number, since 2×31719335949² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31719335895 and 31719335904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31719335941) 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 in 47 ways as a sum of consecutive naturals, for example, 2917207 + ... + 2928059.

It is an arithmetic number, because the mean of its divisors is an integer number (1138975344).

Almost surely, 2^31719335949 is an apocalyptic number.

It is an amenable number.

31719335949 is a deficient number, since it is larger than the sum of its proper divisors (22951480563).

31719335949 is a wasteful number, since it uses less digits than its factorization.

31719335949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906 (or 12903 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The spelling of 31719335949 in words is "thirty-one billion, seven hundred nineteen million, three hundred thirty-five thousand, nine hundred forty-nine".