31113140 has 12 divisors (see below), whose sum is σ = 65337636. Its totient is φ = 12445248.

The previous prime is 31113113. The next prime is 31113167. The reversal of 31113140 is 4131113.

It is an interprime number because it is at equal distance from previous prime (31113113) and next prime (31113167).

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 12208036 = 4348^2 + 3494^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777809 + ... + 777848.

It is an arithmetic number, because the mean of its divisors is an integer number (5444803).

Almost surely, 2^31113140 is an apocalyptic number.

It is an amenable number.

31113140 is an abundant number, since it is smaller than the sum of its proper divisors (34224496).

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

31113140 is a wasteful number, since it uses less digits than its factorization.

31113140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555666 (or 1555664 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 31113140 is about 5577.9153812155. The cubic root of 31113140 is about 314.5197687846.

Adding to 31113140 its reverse (4131113), we get a palindrome (35244253).

The spelling of 31113140 in words is "thirty-one million, one hundred thirteen thousand, one hundred forty".