31344131 has 32 divisors (see below), whose sum is σ = 40943616. Its totient is φ = 23328000.

The previous prime is 31344121. The next prime is 31344139. The reversal of 31344131 is 13144313.

It is a cyclic number.

It is not a de Polignac number, because 31344131 - 2⁶ = 31344067 is a prime.

It is a super-2 number, since 2×31344131² = 1964909096290322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31344139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115526 + ... + 115796.

It is an arithmetic number, because the mean of its divisors is an integer number (1279488).

Almost surely, 2^31344131 is an apocalyptic number.

31344131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31344131 is a deficient number, since it is larger than the sum of its proper divisors (9599485).

31344131 is a wasteful number, since it uses less digits than its factorization.

31344131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363.

The product of its digits is 432, while the sum is 20.

The square root of 31344131 is about 5598.5829457105. The cubic root of 31344131 is about 315.2962058007.

Adding to 31344131 its reverse (13144313), we get a palindrome (44488444).

It can be divided in two parts, 313 and 44131, that added together give a palindrome (44444).

The spelling of 31344131 in words is "thirty-one million, three hundred forty-four thousand, one hundred thirty-one".