1118063521 has 4 divisors (see below), whose sum is σ = 1148281492. Its totient is φ = 1087845552.

The previous prime is 1118063519. The next prime is 1118063533. The reversal of 1118063521 is 1253608111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 596580625 + 521482896 = 24425^2 + 22836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118063521 - 2¹ = 1118063519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1118063521.

It is not an unprimeable number, because it can be changed into a prime (1118063501) 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, 15108930 + ... + 15109003.

It is an arithmetic number, because the mean of its divisors is an integer number (287070373).

Almost surely, 2^1118063521 is an apocalyptic number.

It is an amenable number.

1118063521 is a deficient number, since it is larger than the sum of its proper divisors (30217971).

1118063521 is an equidigital number, since it uses as much as digits as its factorization.

1118063521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30217970.

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

The square root of 1118063521 is about 33437.4568560469. The cubic root of 1118063521 is about 1037.8999539132.

The spelling of 1118063521 in words is "one billion, one hundred eighteen million, sixty-three thousand, five hundred twenty-one".