2031231401 has 4 divisors (see below), whose sum is σ = 2031341904. Its totient is φ = 2031120900.

The previous prime is 2031231359. The next prime is 2031231443. The reversal of 2031231401 is 1041321302.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (2031231359) and next prime (2031231443).

It is a cyclic number.

It is not a de Polignac number, because 2031231401 - 2⁶ = 2031231337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031231401.

It is not an unprimeable number, because it can be changed into a prime (2031231901) 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, 20315 + ... + 66896.

It is an arithmetic number, because the mean of its divisors is an integer number (507835476).

Almost surely, 2^2031231401 is an apocalyptic number.

It is an amenable number.

2031231401 is a deficient number, since it is larger than the sum of its proper divisors (110503).

2031231401 is an equidigital number, since it uses as much as digits as its factorization.

2031231401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110502.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2031231401 is about 45069.1846054485. The cubic root of 2031231401 is about 1266.4453893784.

Adding to 2031231401 its reverse (1041321302), we get a palindrome (3072552703).

The spelling of 2031231401 in words is "two billion, thirty-one million, two hundred thirty-one thousand, four hundred one".