245552540205221 has 16 divisors (see below), whose sum is σ = 256349740644480. Its totient is φ = 234765444925440.

The previous prime is 245552540205121. The next prime is 245552540205239. The reversal of 245552540205221 is 122502045255542.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245552540205221 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 (245552540205281) 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, 511505921 + ... + 511985753.

It is an arithmetic number, because the mean of its divisors is an integer number (16021858790280).

Almost surely, 2^{245552540205221} is an apocalyptic number.

It is an amenable number.

245552540205221 is a deficient number, since it is larger than the sum of its proper divisors (10797200439259).

245552540205221 is a wasteful number, since it uses less digits than its factorization.

245552540205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490316.

The product of its (nonzero) digits is 1600000, while the sum is 44.

The spelling of 245552540205221 in words is "two hundred forty-five trillion, five hundred fifty-two billion, five hundred forty million, two hundred five thousand, two hundred twenty-one".