7531042440421 has 16 divisors (see below), whose sum is σ = 7988239131840. Its totient is φ = 7079932604160.

The previous prime is 7531042440409. The next prime is 7531042440451. The reversal of 7531042440421 is 1240442401357.

It is a cyclic number.

It is not a de Polignac number, because 7531042440421 - 2²³ = 7531034051813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7531042440451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93777741 + ... + 93858013.

It is an arithmetic number, because the mean of its divisors is an integer number (499264945740).

Almost surely, 2^{7531042440421} is an apocalyptic number.

It is an amenable number.

7531042440421 is a deficient number, since it is larger than the sum of its proper divisors (457196691419).

7531042440421 is a wasteful number, since it uses less digits than its factorization.

7531042440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118116.

The product of its (nonzero) digits is 107520, while the sum is 37.

Adding to 7531042440421 its reverse (1240442401357), we get a palindrome (8771484841778).

The spelling of 7531042440421 in words is "seven trillion, five hundred thirty-one billion, forty-two million, four hundred forty thousand, four hundred twenty-one".