31440130111 has 4 divisors (see below), whose sum is σ = 33858601672. Its totient is φ = 29021658552.

The previous prime is 31440130087. The next prime is 31440130147. The reversal of 31440130111 is 11103104413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31440130111 - 2⁷ = 31440129983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440130171) 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, 1209235761 + ... + 1209235786.

It is an arithmetic number, because the mean of its divisors is an integer number (8464650418).

Almost surely, 2^31440130111 is an apocalyptic number.

31440130111 is a deficient number, since it is larger than the sum of its proper divisors (2418471561).

31440130111 is a wasteful number, since it uses less digits than its factorization.

31440130111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418471560.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31440130111 its reverse (11103104413), we get a palindrome (42543234524).

The spelling of 31440130111 in words is "thirty-one billion, four hundred forty million, one hundred thirty thousand, one hundred eleven".