31111111404 has 54 divisors (see below), whose sum is σ = 82998906900. Its totient is φ = 9824557392.

The previous prime is 31111111403. The next prime is 31111111411. The reversal of 31111111404 is 40411111113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31111111403) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1183954 + ... + 1209945.

Almost surely, 2^31111111404 is an apocalyptic number.

It is an amenable number.

31111111404 is an abundant number, since it is smaller than the sum of its proper divisors (51887795496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111111404 is a wasteful number, since it uses less digits than its factorization.

31111111404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393947 (or 2393923 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 31111111404 its reverse (40411111113), we get a palindrome (71522222517).

The spelling of 31111111404 in words is "thirty-one billion, one hundred eleven million, one hundred eleven thousand, four hundred four".