521233240043 has 4 divisors (see below), whose sum is σ = 521235230880. Its totient is φ = 521231249208.

The previous prime is 521233239997. The next prime is 521233240069. The reversal of 521233240043 is 340042332125.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 521233240043 - 2²⁶ = 521166131179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521233239988 and 521233240015.

It is not an unprimeable number, because it can be changed into a prime (521233240343) 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, 530228 + ... + 1150481.

It is an arithmetic number, because the mean of its divisors is an integer number (130308807720).

Almost surely, 2^521233240043 is an apocalyptic number.

521233240043 is a deficient number, since it is larger than the sum of its proper divisors (1990837).

521233240043 is a wasteful number, since it uses less digits than its factorization.

521233240043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990836.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 521233240043 its reverse (340042332125), we get a palindrome (861275572168).

The spelling of 521233240043 in words is "five hundred twenty-one billion, two hundred thirty-three million, two hundred forty thousand, forty-three".