646224141 has 4 divisors (see below), whose sum is σ = 861632192. Its totient is φ = 430816092.

The previous prime is 646224121. The next prime is 646224151. The reversal of 646224141 is 141422646.

It is a happy number.

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 not a de Polignac number, because 646224141 - 2⁷ = 646224013 is a prime.

It is a super-2 number, since 2×646224141² = 835211280822375762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646224099 and 646224108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646224121) 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, 107704021 + ... + 107704026.

It is an arithmetic number, because the mean of its divisors is an integer number (215408048).

Almost surely, 2^646224141 is an apocalyptic number.

It is an amenable number.

646224141 is a deficient number, since it is larger than the sum of its proper divisors (215408051).

646224141 is a wasteful number, since it uses less digits than its factorization.

646224141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215408050.

The product of its digits is 9216, while the sum is 30.

The square root of 646224141 is about 25420.9390267158. The cubic root of 646224141 is about 864.5585152852.

Adding to 646224141 its reverse (141422646), we get a palindrome (787646787).

It can be divided in two parts, 6462 and 24141, that added together give a palindrome (30603).

The spelling of 646224141 in words is "six hundred forty-six million, two hundred twenty-four thousand, one hundred forty-one".