3131422021 has 16 divisors (see below), whose sum is σ = 3857712768. Its totient is φ = 2475259200.

The previous prime is 3131421989. The next prime is 3131422031. The reversal of 3131422021 is 1202241313.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3131422021 - 2⁵ = 3131421989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3131422021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131422031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83511 + ... + 115051.

It is an arithmetic number, because the mean of its divisors is an integer number (241107048).

Almost surely, 2^3131422021 is an apocalyptic number.

It is an amenable number.

3131422021 is a deficient number, since it is larger than the sum of its proper divisors (726290747).

3131422021 is a wasteful number, since it uses less digits than its factorization.

3131422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32652.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3131422021 is about 55959.1102591884. The cubic root of 3131422021 is about 1463.0096826900.

Adding to 3131422021 its reverse (1202241313), we get a palindrome (4333663334).

It can be divided in two parts, 31314 and 22021, that added together give a palindrome (53335).

The spelling of 3131422021 in words is "three billion, one hundred thirty-one million, four hundred twenty-two thousand, twenty-one".