1056210091 has 2 divisors, whose sum is σ = 1056210092. Its totient is φ = 1056210090.

The previous prime is 1056209971. The next prime is 1056210107. The reversal of 1056210091 is 1900126501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1056210091 - 2¹⁹ = 1055685803 is a prime.

It is a super-2 number, since 2×1056210091² = 2231159512660456562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056210691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528105045 + 528105046.

It is an arithmetic number, because the mean of its divisors is an integer number (528105046).

Almost surely, 2^1056210091 is an apocalyptic number.

1056210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056210091 is an equidigital number, since it uses as much as digits as its factorization.

1056210091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1056210091 is about 32499.3860095849. The cubic root of 1056210091 is about 1018.3962015528.

Adding to 1056210091 its reverse (1900126501), we get a palindrome (2956336592).

The spelling of 1056210091 in words is "one billion, fifty-six million, two hundred ten thousand, ninety-one".