1055567521 has 2 divisors, whose sum is σ = 1055567522. Its totient is φ = 1055567520.

The previous prime is 1055567459. The next prime is 1055567531. The reversal of 1055567521 is 1257655501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055535121 + 32400 = 32489^2 + 180^2 .

It is an emirp because it is prime and its reverse (1257655501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1055567521 - 2¹⁹ = 1055043233 is a prime.

It is a super-2 number, since 2×1055567521² = 2228445582780170882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1055567531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527783760 + 527783761.

It is an arithmetic number, because the mean of its divisors is an integer number (527783761).

Almost surely, 2^1055567521 is an apocalyptic number.

It is an amenable number.

1055567521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055567521 is an equidigital number, since it uses as much as digits as its factorization.

1055567521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52500, while the sum is 37.

The square root of 1055567521 is about 32489.4986264793. The cubic root of 1055567521 is about 1018.1896379779.

The spelling of 1055567521 in words is "one billion, fifty-five million, five hundred sixty-seven thousand, five hundred twenty-one".