1051911521 has 2 divisors, whose sum is σ = 1051911522. Its totient is φ = 1051911520.

The previous prime is 1051911493. The next prime is 1051911527. The reversal of 1051911521 is 1251191501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709476496 + 342435025 = 26636^2 + 18505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051911521 - 2¹⁴ = 1051895137 is a prime.

It is a super-2 number, since 2×1051911521² = 2213035696025066882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1051911527) 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, 525955760 + 525955761.

It is an arithmetic number, because the mean of its divisors is an integer number (525955761).

Almost surely, 2^1051911521 is an apocalyptic number.

It is an amenable number.

1051911521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051911521 is an equidigital number, since it uses as much as digits as its factorization.

1051911521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 26.

The square root of 1051911521 is about 32433.1854895568. The cubic root of 1051911521 is about 1017.0127648084.

The spelling of 1051911521 in words is "one billion, fifty-one million, nine hundred eleven thousand, five hundred twenty-one".