31331202401 has 4 divisors (see below), whose sum is σ = 31334200512. Its totient is φ = 31328204292.

The previous prime is 31331202391. The next prime is 31331202451. The reversal of 31331202401 is 10420213313.

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 an emirpimes, since its reverse is a distinct semiprime: 10420213313 = 31357 ⋅332309.

It is a cyclic number.

It is not a de Polignac number, because 31331202401 - 2³⁰ = 30257460577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331202451) 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 3 ways as a sum of consecutive naturals, for example, 1483325 + ... + 1504298.

It is an arithmetic number, because the mean of its divisors is an integer number (7833550128).

Almost surely, 2^31331202401 is an apocalyptic number.

It is an amenable number.

31331202401 is a deficient number, since it is larger than the sum of its proper divisors (2998111).

31331202401 is a wasteful number, since it uses less digits than its factorization.

31331202401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998110.

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

Adding to 31331202401 its reverse (10420213313), we get a palindrome (41751415714).

The spelling of 31331202401 in words is "thirty-one billion, three hundred thirty-one million, two hundred two thousand, four hundred one".