642520203 has 16 divisors (see below), whose sum is σ = 962707200. Its totient is φ = 378205344.

The previous prime is 642520199. The next prime is 642520211. The reversal of 642520203 is 302025246.

It is not a de Polignac number, because 642520203 - 2² = 642520199 is a prime.

It is a super-2 number, since 2×642520203² = 825664422526322418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642520213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357253 + ... + 359046.

It is an arithmetic number, because the mean of its divisors is an integer number (60169200).

Almost surely, 2^642520203 is an apocalyptic number.

642520203 is a deficient number, since it is larger than the sum of its proper divisors (320186997).

642520203 is a wasteful number, since it uses less digits than its factorization.

642520203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716338.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 642520203 is about 25347.9822273884. The cubic root of 642520203 is about 862.9035638000.

Adding to 642520203 its reverse (302025246), we get a palindrome (944545449).

The spelling of 642520203 in words is "six hundred forty-two million, five hundred twenty thousand, two hundred three".