1035540221 has 4 divisors (see below), whose sum is σ = 1045040700. Its totient is φ = 1026039744.

The previous prime is 1035540217. The next prime is 1035540229. The reversal of 1035540221 is 1220455301.

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 299774596 + 735765625 = 17314^2 + 27125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1035540221 - 2² = 1035540217 is a prime.

It is a super-3 number, since 3×1035540221³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

1035540221 is a modest number, since divided by 40221 gives 10355 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1035540229) 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, 4750076 + ... + 4750293.

It is an arithmetic number, because the mean of its divisors is an integer number (261260175).

Almost surely, 2^1035540221 is an apocalyptic number.

It is an amenable number.

1035540221 is a deficient number, since it is larger than the sum of its proper divisors (9500479).

1035540221 is an equidigital number, since it uses as much as digits as its factorization.

1035540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9500478.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1035540221 is about 32179.8107670011. The cubic root of 1035540221 is about 1011.7091021424.

Adding to 1035540221 its reverse (1220455301), we get a palindrome (2255995522).

The spelling of 1035540221 in words is "one billion, thirty-five million, five hundred forty thousand, two hundred twenty-one".