543400510021 has 8 divisors (see below), whose sum is σ = 550862230464. Its totient is φ = 535980828000.

The previous prime is 543400510007. The next prime is 543400510033. The reversal of 543400510021 is 120015004345.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 543400510021 - 2⁵ = 543400509989 is a prime.

It is a super-2 number, since 2×543400510021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543400511021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10483576 + ... + 10535281.

It is an arithmetic number, because the mean of its divisors is an integer number (68857778808).

Almost surely, 2^543400510021 is an apocalyptic number.

It is an amenable number.

543400510021 is a deficient number, since it is larger than the sum of its proper divisors (7461720443).

543400510021 is a wasteful number, since it uses less digits than its factorization.

543400510021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019211.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 543400510021 its reverse (120015004345), we get a palindrome (663415514366).

The spelling of 543400510021 in words is "five hundred forty-three billion, four hundred million, five hundred ten thousand, twenty-one".