245343422216021 has 16 divisors (see below), whose sum is σ = 256437089576640. Its totient is φ = 234425648970240.

The previous prime is 245343422216017. The next prime is 245343422216041. The reversal of 245343422216021 is 120612224343542.

It is a cyclic number.

It is not a de Polignac number, because 245343422216021 - 2² = 245343422216017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245343422216021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245343422216041) 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, 39609326 + ... + 45382656.

It is an arithmetic number, because the mean of its divisors is an integer number (16027318098540).

Almost surely, 2^{245343422216021} is an apocalyptic number.

It is an amenable number.

245343422216021 is a deficient number, since it is larger than the sum of its proper divisors (11093667360619).

245343422216021 is a wasteful number, since it uses less digits than its factorization.

245343422216021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788564.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 245343422216021 its reverse (120612224343542), we get a palindrome (365955646559563).

The spelling of 245343422216021 in words is "two hundred forty-five trillion, three hundred forty-three billion, four hundred twenty-two million, two hundred sixteen thousand, twenty-one".