4031117621 has 2 divisors, whose sum is σ = 4031117622. Its totient is φ = 4031117620.

The previous prime is 4031117617. The next prime is 4031117641. The reversal of 4031117621 is 1267111304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3967740100 + 63377521 = 62990^2 + 7961^2 .

It is a cyclic number.

It is not a de Polignac number, because 4031117621 - 2² = 4031117617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4031117641) 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 as a sum of consecutive naturals, namely, 2015558810 + 2015558811.

It is an arithmetic number, because the mean of its divisors is an integer number (2015558811).

Almost surely, 2^4031117621 is an apocalyptic number.

It is an amenable number.

4031117621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4031117621 is an equidigital number, since it uses as much as digits as its factorization.

4031117621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 4031117621 is about 63491.0830038361. The cubic root of 4031117621 is about 1591.5067689828.

Adding to 4031117621 its reverse (1267111304), we get a palindrome (5298228925).

The spelling of 4031117621 in words is "four billion, thirty-one million, one hundred seventeen thousand, six hundred twenty-one".