31450949385 has 16 divisors (see below), whose sum is σ = 51072588096. Its totient is φ = 16523483328.

The previous prime is 31450949381. The next prime is 31450949419. The reversal of 31450949385 is 58394905413.

It is not a de Polignac number, because 31450949385 - 2² = 31450949381 is a prime.

It is a super-3 number, since 3×31450949385³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31450949381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15646234 + ... + 15648243.

It is an arithmetic number, because the mean of its divisors is an integer number (3192036756).

Almost surely, 2^31450949385 is an apocalyptic number.

It is an amenable number.

31450949385 is a deficient number, since it is larger than the sum of its proper divisors (19621638711).

31450949385 is a wasteful number, since it uses less digits than its factorization.

31450949385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31294552.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 31450949385 in words is "thirty-one billion, four hundred fifty million, nine hundred forty-nine thousand, three hundred eighty-five".