4061221531 has 2 divisors, whose sum is σ = 4061221532. Its totient is φ = 4061221530.

The previous prime is 4061221529. The next prime is 4061221553. The reversal of 4061221531 is 1351221604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4061221531 - 2¹ = 4061221529 is a prime.

It is a super-2 number, since 2×4061221531² = 32987040647715967922, which contains 22 as substring.

Together with 4061221529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4061221496 and 4061221505.

It is not a weakly prime, because it can be changed into another prime (4061221501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2030610765 + 2030610766.

It is an arithmetic number, because the mean of its divisors is an integer number (2030610766).

Almost surely, 2^4061221531 is an apocalyptic number.

4061221531 is a deficient number, since it is larger than the sum of its proper divisors (1).

4061221531 is an equidigital number, since it uses as much as digits as its factorization.

4061221531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 4061221531 is about 63727.7139947762. The cubic root of 4061221531 is about 1595.4586759456.

The spelling of 4061221531 in words is "four billion, sixty-one million, two hundred twenty-one thousand, five hundred thirty-one".