31441320 has 48 divisors (see below), whose sum is σ = 102185460. Its totient is φ = 8384256.

The previous prime is 31441303. The next prime is 31441331. The reversal of 31441320 is 2314413.

It can be written as a sum of positive squares in 2 ways, for example, as 29746116 + 1695204 = 5454^2 + 1302^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31441293 and 31441302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43309 + ... + 44028.

Almost surely, 2^31441320 is an apocalyptic number.

31441320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31441320 is an abundant number, since it is smaller than the sum of its proper divisors (70744140).

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

31441320 is a wasteful number, since it uses less digits than its factorization.

31441320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87354 (or 87347 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31441320 is about 5607.2560134169. The cubic root of 31441320 is about 315.6217500564.

Adding to 31441320 its reverse (2314413), we get a palindrome (33755733).

The spelling of 31441320 in words is "thirty-one million, four hundred forty-one thousand, three hundred twenty".