31828361 has 4 divisors (see below), whose sum is σ = 31880400. Its totient is φ = 31776324.

The previous prime is 31828309. The next prime is 31828373. The reversal of 31828361 is 16382813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31828361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31828061) 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 3 ways as a sum of consecutive naturals, for example, 25091 + ... + 26328.

It is an arithmetic number, because the mean of its divisors is an integer number (7970100).

Almost surely, 2^31828361 is an apocalyptic number.

It is an amenable number.

31828361 is a deficient number, since it is larger than the sum of its proper divisors (52039).

31828361 is an equidigital number, since it uses as much as digits as its factorization.

31828361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52038.

The product of its digits is 6912, while the sum is 32.

The square root of 31828361 is about 5641.6629640559. The cubic root of 31828361 is about 316.9115676462.

The spelling of 31828361 in words is "thirty-one million, eight hundred twenty-eight thousand, three hundred sixty-one".