31134120 has 32 divisors (see below), whose sum is σ = 93402720. Its totient is φ = 8302400.

The previous prime is 31134113. The next prime is 31134127. The reversal of 31134120 is 2143113.

It is an interprime number because it is at equal distance from previous prime (31134113) and next prime (31134127).

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

It is a self number, because there is not a number n which added to its sum of digits gives 31134120.

It is not an unprimeable number, because it can be changed into a prime (31134127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129606 + ... + 129845.

It is an arithmetic number, because the mean of its divisors is an integer number (2918835).

Almost surely, 2^31134120 is an apocalyptic number.

31134120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31134120 is an abundant number, since it is smaller than the sum of its proper divisors (62268600).

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

31134120 is a wasteful number, since it uses less digits than its factorization.

31134120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259465 (or 259461 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31134120 is about 5579.7956951845. The cubic root of 31134120 is about 314.5904478409.

Adding to 31134120 its reverse (2143113), we get a palindrome (33277233).

The spelling of 31134120 in words is "thirty-one million, one hundred thirty-four thousand, one hundred twenty".