403242335541021 has 32 divisors (see below), whose sum is σ = 543320809799680. Its totient is φ = 266007773775744.

The previous prime is 403242335541013. The next prime is 403242335541077. The reversal of 403242335541021 is 120145533242304.

It is a happy number.

It is not a de Polignac number, because 403242335541021 - 2³ = 403242335541013 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 (403242335591021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367958736 + ... + 369052998.

It is an arithmetic number, because the mean of its divisors is an integer number (16978775306240).

Almost surely, 2^{403242335541021} is an apocalyptic number.

It is an amenable number.

403242335541021 is a deficient number, since it is larger than the sum of its proper divisors (140078474258659).

403242335541021 is a wasteful number, since it uses less digits than its factorization.

403242335541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096945.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 403242335541021 its reverse (120145533242304), we get a palindrome (523387868783325).

The spelling of 403242335541021 in words is "four hundred three trillion, two hundred forty-two billion, three hundred thirty-five million, five hundred forty-one thousand, twenty-one".