1051221653 has 2 divisors, whose sum is σ = 1051221654. Its totient is φ = 1051221652.

The previous prime is 1051221593. The next prime is 1051221701. The reversal of 1051221653 is 3561221501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1048270129 + 2951524 = 32377^2 + 1718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051221653 - 2¹⁴ = 1051205269 is a prime.

It is a super-2 number, since 2×1051221653² = 2210133927472104818, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051221553) 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, 525610826 + 525610827.

It is an arithmetic number, because the mean of its divisors is an integer number (525610827).

Almost surely, 2^1051221653 is an apocalyptic number.

It is an amenable number.

1051221653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051221653 is an equidigital number, since it uses as much as digits as its factorization.

1051221653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1051221653 is about 32422.5485272210. The cubic root of 1051221653 is about 1016.7903893266.

The spelling of 1051221653 in words is "one billion, fifty-one million, two hundred twenty-one thousand, six hundred fifty-three".