31001111138 has 8 divisors (see below), whose sum is σ = 46512860160. Its totient is φ = 15496824420.

The previous prime is 31001111137. The next prime is 31001111147. The reversal of 31001111138 is 83111110013.

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

It is a super-2 number, since 2×31001111138² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31001111137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855178 + ... + 1871813.

It is an arithmetic number, because the mean of its divisors is an integer number (5814107520).

Almost surely, 2^31001111138 is an apocalyptic number.

31001111138 is a deficient number, since it is larger than the sum of its proper divisors (15511749022).

31001111138 is a wasteful number, since it uses less digits than its factorization.

31001111138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731152.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 31001111138 in words is "thirty-one billion, one million, one hundred eleven thousand, one hundred thirty-eight".