506543022251 has 24 divisors (see below), whose sum is σ = 597529677600. Its totient is φ = 428117004672.

The previous prime is 506543022247. The next prime is 506543022253. The reversal of 506543022251 is 152220345605.

It is not a de Polignac number, because 506543022251 - 2² = 506543022247 is a prime.

It is a super-2 number, since 2×506543022251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506543022253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 747026 + ... + 1253448.

It is an arithmetic number, because the mean of its divisors is an integer number (24897069900).

Almost surely, 2^506543022251 is an apocalyptic number.

506543022251 is a deficient number, since it is larger than the sum of its proper divisors (90986655349).

506543022251 is a wasteful number, since it uses less digits than its factorization.

506543022251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506723 (or 506716 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 506543022251 its reverse (152220345605), we get a palindrome (658763367856).

The spelling of 506543022251 in words is "five hundred six billion, five hundred forty-three million, twenty-two thousand, two hundred fifty-one".