4004021431 has 2 divisors, whose sum is σ = 4004021432. Its totient is φ = 4004021430.

The previous prime is 4004021393. The next prime is 4004021443. The reversal of 4004021431 is 1341204004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4004021431 - 2²¹ = 4001924279 is a prime.

It is a super-2 number, since 2×4004021431² = 32064375239814575522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4004021399 and 4004021408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4004021471) 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, 2002010715 + 2002010716.

It is an arithmetic number, because the mean of its divisors is an integer number (2002010716).

Almost surely, 2^4004021431 is an apocalyptic number.

4004021431 is a deficient number, since it is larger than the sum of its proper divisors (1).

4004021431 is an equidigital number, since it uses as much as digits as its factorization.

4004021431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4004021431 is about 63277.3374202803. The cubic root of 4004021431 is about 1587.9328424448.

Adding to 4004021431 its reverse (1341204004), we get a palindrome (5345225435).

The spelling of 4004021431 in words is "four billion, four million, twenty-one thousand, four hundred thirty-one".