640220214203 has 4 divisors (see below), whose sum is σ = 642482476728. Its totient is φ = 637957951680.

The previous prime is 640220214197. The next prime is 640220214209. The reversal of 640220214203 is 302412022046.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (640220214197) and next prime (640220214209).

It is a cyclic number.

It is not a de Polignac number, because 640220214203 - 2⁴ = 640220214187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640220214209) 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, 1131130838 + ... + 1131131403.

It is an arithmetic number, because the mean of its divisors is an integer number (160620619182).

Almost surely, 2^640220214203 is an apocalyptic number.

640220214203 is a deficient number, since it is larger than the sum of its proper divisors (2262262525).

640220214203 is a wasteful number, since it uses less digits than its factorization.

640220214203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262262524.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 640220214203 its reverse (302412022046), we get a palindrome (942632236249).

The spelling of 640220214203 in words is "six hundred forty billion, two hundred twenty million, two hundred fourteen thousand, two hundred three".