31105044 has 18 divisors (see below), whose sum is σ = 78626730. Its totient is φ = 10368336.

The previous prime is 31105027. The next prime is 31105051. The reversal of 31105044 is 44050113.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30669444 + 435600 = 5538^2 + 660^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431979 + ... + 432050.

Almost surely, 2^31105044 is an apocalyptic number.

It is an amenable number.

31105044 is an abundant number, since it is smaller than the sum of its proper divisors (47521686).

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

31105044 is a wasteful number, since it uses less digits than its factorization.

31105044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864039 (or 864034 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31105044 is about 5577.1896148508. The cubic root of 31105044 is about 314.4924858537.

Adding to 31105044 its reverse (44050113), we get a palindrome (75155157).

The spelling of 31105044 in words is "thirty-one million, one hundred five thousand, forty-four".