31848381 has 12 divisors (see below), whose sum is σ = 46108608. Its totient is φ = 21183624.

The previous prime is 31848371. The next prime is 31848413. The reversal of 31848381 is 18384813.

It is not a de Polignac number, because 31848381 - 2⁶ = 31848317 is a prime.

It is a super-2 number, since 2×31848381² = 2028638744642322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31848331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346 + ... + 7988.

It is an arithmetic number, because the mean of its divisors is an integer number (3842384).

Almost surely, 2^31848381 is an apocalyptic number.

It is an amenable number.

31848381 is a deficient number, since it is larger than the sum of its proper divisors (14260227).

31848381 is a wasteful number, since it uses less digits than its factorization.

31848381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8112 (or 8109 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 31848381 is about 5643.4369846752. The cubic root of 31848381 is about 316.9779993820.

Adding to 31848381 its product of digits (18432), we get a palindrome (31866813).

The spelling of 31848381 in words is "thirty-one million, eight hundred forty-eight thousand, three hundred eighty-one".