31120140165 has 8 divisors (see below), whose sum is σ = 49792224288. Its totient is φ = 16597408080.

The previous prime is 31120140151. The next prime is 31120140229. The reversal of 31120140165 is 56104102113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31120140165 - 2¹⁴ = 31120123781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037337991 + ... + 1037338020.

It is an arithmetic number, because the mean of its divisors is an integer number (6224028036).

Almost surely, 2^31120140165 is an apocalyptic number.

It is an amenable number.

31120140165 is a deficient number, since it is larger than the sum of its proper divisors (18672084123).

31120140165 is a wasteful number, since it uses less digits than its factorization.

31120140165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074676019.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 31120140165 its reverse (56104102113), we get a palindrome (87224242278).

The spelling of 31120140165 in words is "thirty-one billion, one hundred twenty million, one hundred forty thousand, one hundred sixty-five".