521131424043 has 16 divisors (see below), whose sum is σ = 695912251680. Its totient is φ = 346886055936.

The previous prime is 521131423993. The next prime is 521131424081. The reversal of 521131424043 is 340424131125.

It is not a de Polignac number, because 521131424043 - 2⁹ = 521131423531 is a prime.

It is a super-2 number, since 2×521131424043² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521131424043.

It is not an unprimeable number, because it can be changed into a prime (521131494043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7768321 + ... + 7835117.

It is an arithmetic number, because the mean of its divisors is an integer number (43494515730).

Almost surely, 2^521131424043 is an apocalyptic number.

521131424043 is a deficient number, since it is larger than the sum of its proper divisors (174780827637).

521131424043 is a wasteful number, since it uses less digits than its factorization.

521131424043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70766.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 521131424043 its reverse (340424131125), we get a palindrome (861555555168).

The spelling of 521131424043 in words is "five hundred twenty-one billion, one hundred thirty-one million, four hundred twenty-four thousand, forty-three".