31204001 has 4 divisors (see below), whose sum is σ = 31715604. Its totient is φ = 30692400.

The previous prime is 31203989. The next prime is 31204007. The reversal of 31204001 is 10040213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10040213 = 23 ⋅436531.

It can be written as a sum of positive squares in 2 ways, for example, as 456976 + 30747025 = 676^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204001 - 2⁶ = 31203937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31204007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255710 + ... + 255831.

It is an arithmetic number, because the mean of its divisors is an integer number (7928901).

Almost surely, 2^31204001 is an apocalyptic number.

It is an amenable number.

31204001 is a deficient number, since it is larger than the sum of its proper divisors (511603).

31204001 is an equidigital number, since it uses as much as digits as its factorization.

31204001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511602.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 31204001 is about 5586.0541529778. The cubic root of 31204001 is about 314.8256396266.

Adding to 31204001 its reverse (10040213), we get a palindrome (41244214).

The spelling of 31204001 in words is "thirty-one million, two hundred four thousand, one".