4015052021 has 2 divisors, whose sum is σ = 4015052022. Its totient is φ = 4015052020.

The previous prime is 4015051969. The next prime is 4015052053. The reversal of 4015052021 is 1202505104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3377236996 + 637815025 = 58114^2 + 25255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4015052021 is a prime.

It is a super-2 number, since 2×4015052021² = 32241285462672368882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4015051984 and 4015052002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4015052071) 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 as a sum of consecutive naturals, namely, 2007526010 + 2007526011.

It is an arithmetic number, because the mean of its divisors is an integer number (2007526011).

Almost surely, 2^4015052021 is an apocalyptic number.

It is an amenable number.

4015052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4015052021 is an equidigital number, since it uses as much as digits as its factorization.

4015052021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 4015052021 is about 63364.4381415948. The cubic root of 4015052021 is about 1589.3896924594.

Adding to 4015052021 its reverse (1202505104), we get a palindrome (5217557125).

The spelling of 4015052021 in words is "four billion, fifteen million, fifty-two thousand, twenty-one".