415143500221 has 4 divisors (see below), whose sum is σ = 415231440444. Its totient is φ = 415055560000.

The previous prime is 415143500209. The next prime is 415143500251. The reversal of 415143500221 is 122005341514.

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 319096192996 + 96047307225 = 564886^2 + 309915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-415143500221 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 415143500221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (415143500251) 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, 43963030 + ... + 43972471.

It is an arithmetic number, because the mean of its divisors is an integer number (103807860111).

Almost surely, 2^415143500221 is an apocalyptic number.

It is an amenable number.

415143500221 is a deficient number, since it is larger than the sum of its proper divisors (87940223).

415143500221 is an equidigital number, since it uses as much as digits as its factorization.

415143500221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87940222.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 415143500221 its reverse (122005341514), we get a palindrome (537148841735).

The spelling of 415143500221 in words is "four hundred fifteen billion, one hundred forty-three million, five hundred thousand, two hundred twenty-one".