31130340 has 48 divisors (see below), whose sum is σ = 90175680. Its totient is φ = 8014720.

The previous prime is 31130327. The next prime is 31130353. The reversal of 31130340 is 4303113.

It is an interprime number because it is at equal distance from previous prime (31130327) and next prime (31130353).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7206 + ... + 10685.

It is an arithmetic number, because the mean of its divisors is an integer number (1878660).

Almost surely, 2^31130340 is an apocalyptic number.

31130340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31130340 is an abundant number, since it is smaller than the sum of its proper divisors (59045340).

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

31130340 is a wasteful number, since it uses less digits than its factorization.

31130340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17932 (or 17930 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31130340 is about 5579.4569628235. The cubic root of 31130340 is about 314.5777158283.

Adding to 31130340 its reverse (4303113), we get a palindrome (35433453).

The spelling of 31130340 in words is "thirty-one million, one hundred thirty thousand, three hundred forty".