31344156 has 36 divisors (see below), whose sum is σ = 80323152. Its totient is φ = 10304064.

The previous prime is 31344151. The next prime is 31344169. The reversal of 31344156 is 65144313.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×31344156² = 1964912230704672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3336 + ... + 8591.

Almost surely, 2^31344156 is an apocalyptic number.

31344156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31344156 is an abundant number, since it is smaller than the sum of its proper divisors (48978996).

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

31344156 is a wasteful number, since it uses less digits than its factorization.

31344156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12010 (or 12005 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 31344156 is about 5598.5851784178. The cubic root of 31344156 is about 315.2962896271.

Adding to 31344156 its reverse (65144313), we get a palindrome (96488469).

The spelling of 31344156 in words is "thirty-one million, three hundred forty-four thousand, one hundred fifty-six".