35540040221 has 4 divisors (see below), whose sum is σ = 40617188832. Its totient is φ = 30462891612.

The previous prime is 35540040191. The next prime is 35540040229. The reversal of 35540040221 is 12204004553.

It is a happy number.

35540040221 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.

It is a cyclic number.

It is not a de Polignac number, because 35540040221 - 2³⁰ = 34466298397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35540040229) 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, 2538574295 + ... + 2538574308.

It is an arithmetic number, because the mean of its divisors is an integer number (10154297208).

Almost surely, 2^35540040221 is an apocalyptic number.

It is an amenable number.

35540040221 is a deficient number, since it is larger than the sum of its proper divisors (5077148611).

35540040221 is an equidigital number, since it uses as much as digits as its factorization.

35540040221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077148610.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 35540040221 its reverse (12204004553), we get a palindrome (47744044774).

The spelling of 35540040221 in words is "thirty-five billion, five hundred forty million, forty thousand, two hundred twenty-one".