31385127089 has 4 divisors (see below), whose sum is σ = 32749697856. Its totient is φ = 30020556324.

The previous prime is 31385127073. The next prime is 31385127091. The reversal of 31385127089 is 98072158313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31385127089 - 2⁴ = 31385127073 is a prime.

It is a super-2 number, since 2×31385127089² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31385127689) 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 3 ways as a sum of consecutive naturals, for example, 682285349 + ... + 682285394.

It is an arithmetic number, because the mean of its divisors is an integer number (8187424464).

Almost surely, 2^31385127089 is an apocalyptic number.

It is an amenable number.

31385127089 is a deficient number, since it is larger than the sum of its proper divisors (1364570767).

31385127089 is a wasteful number, since it uses less digits than its factorization.

31385127089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364570766.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 31385127089 in words is "thirty-one billion, three hundred eighty-five million, one hundred twenty-seven thousand, eighty-nine".