31105040 has 20 divisors (see below), whose sum is σ = 72319404. Its totient is φ = 12441984.

The previous prime is 31105027. The next prime is 31105051. The reversal of 31105040 is 4050113.

It can be written as a sum of positive squares in 2 ways, for example, as 21270544 + 9834496 = 4612^2 + 3136^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194327 + ... + 194486.

Almost surely, 2^31105040 is an apocalyptic number.

It is an amenable number.

31105040 is an abundant number, since it is smaller than the sum of its proper divisors (41214364).

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

31105040 is a wasteful number, since it uses less digits than its factorization.

31105040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388826 (or 388820 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 31105040 is about 5577.1892562473. The cubic root of 31105040 is about 314.4924723728.

Adding to 31105040 its reverse (4050113), we get a palindrome (35155153).

The spelling of 31105040 in words is "thirty-one million, one hundred five thousand, forty".