1056211399 has 2 divisors, whose sum is σ = 1056211400. Its totient is φ = 1056211398.

The previous prime is 1056211393. The next prime is 1056211423. The reversal of 1056211399 is 9931126501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1056211399 - 2¹¹ = 1056209351 is a prime.

It is a super-2 number, since 2×1056211399² = 2231165038755074402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056211393) 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, 528105699 + 528105700.

It is an arithmetic number, because the mean of its divisors is an integer number (528105700).

Almost surely, 2^1056211399 is an apocalyptic number.

1056211399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056211399 is an equidigital number, since it uses as much as digits as its factorization.

1056211399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1056211399 is about 32499.4061330357. The cubic root of 1056211399 is about 1018.3966219432.

The spelling of 1056211399 in words is "one billion, fifty-six million, two hundred eleven thousand, three hundred ninety-nine".