1051613281 has 2 divisors, whose sum is σ = 1051613282. Its totient is φ = 1051613280.

The previous prime is 1051613201. The next prime is 1051613287. The reversal of 1051613281 is 1823161501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865536400 + 186076881 = 29420^2 + 13641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051613281 - 2¹⁷ = 1051482209 is a prime.

It is a super-2 number, since 2×1051613281² = 2211780985551169922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1051613287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525806640 + 525806641.

It is an arithmetic number, because the mean of its divisors is an integer number (525806641).

Almost surely, 2^1051613281 is an apocalyptic number.

It is an amenable number.

1051613281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051613281 is an equidigital number, since it uses as much as digits as its factorization.

1051613281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1051613281 is about 32428.5874037091. The cubic root of 1051613281 is about 1016.9166405778.

Adding to 1051613281 its reverse (1823161501), we get a palindrome (2874774782).

The spelling of 1051613281 in words is "one billion, fifty-one million, six hundred thirteen thousand, two hundred eighty-one".