1051544381 has 2 divisors, whose sum is σ = 1051544382. Its totient is φ = 1051544380.

The previous prime is 1051544357. The next prime is 1051544399. The reversal of 1051544381 is 1834451501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1043871481 + 7672900 = 32309^2 + 2770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051544381 is a prime.

It is a super-2 number, since 2×1051544381² = 2211491170425346322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051544281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525772190 + 525772191.

It is an arithmetic number, because the mean of its divisors is an integer number (525772191).

Almost surely, 2^1051544381 is an apocalyptic number.

It is an amenable number.

1051544381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051544381 is an equidigital number, since it uses as much as digits as its factorization.

1051544381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1051544381 is about 32427.5250520295. The cubic root of 1051544381 is about 1016.8944311820.

Adding to 1051544381 its reverse (1834451501), we get a palindrome (2885995882).

The spelling of 1051544381 in words is "one billion, fifty-one million, five hundred forty-four thousand, three hundred eighty-one".