1055115521 has 4 divisors (see below), whose sum is σ = 1055180544. Its totient is φ = 1055050500.

The previous prime is 1055115499. The next prime is 1055115533. The reversal of 1055115521 is 1255115501.

1055115521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1055115521 - 2¹⁸ = 1054853377 is a prime.

It is a super-2 number, since 2×1055115521² = 2226537525310202882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055115541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14216 + ... + 48086.

It is an arithmetic number, because the mean of its divisors is an integer number (263795136).

Almost surely, 2^1055115521 is an apocalyptic number.

It is an amenable number.

1055115521 is a deficient number, since it is larger than the sum of its proper divisors (65023).

1055115521 is an equidigital number, since it uses as much as digits as its factorization.

1055115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65022.

The product of its (nonzero) digits is 1250, while the sum is 26.

The square root of 1055115521 is about 32482.5417878589. The cubic root of 1055115521 is about 1018.0442857029.

The spelling of 1055115521 in words is "one billion, fifty-five million, one hundred fifteen thousand, five hundred twenty-one".