31193444 has 12 divisors (see below), whose sum is σ = 56471100. Its totient is φ = 15058848.

The previous prime is 31193443. The next prime is 31193467. The reversal of 31193444 is 44439113.

It can be written as a sum of positive squares in 2 ways, for example, as 5569600 + 25623844 = 2360^2 + 5062^2 .

It is a super-2 number, since 2×31193444² = 1946061897162272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (31193443) 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, 134339 + ... + 134570.

It is an arithmetic number, because the mean of its divisors is an integer number (4705925).

Almost surely, 2^31193444 is an apocalyptic number.

It is an amenable number.

31193444 is a deficient number, since it is larger than the sum of its proper divisors (25277656).

31193444 is a wasteful number, since it uses less digits than its factorization.

31193444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268942 (or 268940 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 31193444 is about 5585.1091305363. The cubic root of 31193444 is about 314.7901314753.

The spelling of 31193444 in words is "thirty-one million, one hundred ninety-three thousand, four hundred forty-four".