245552542243021 has 16 divisors (see below), whose sum is σ = 275972665812480. Its totient is φ = 216782201243520.

The previous prime is 245552542243007. The next prime is 245552542243049. The reversal of 245552542243021 is 120342245255542.

245552542243021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 245552542243021 - 2⁵ = 245552542242989 is a prime.

It is a super-2 number, since 2×245552542243021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245552542243721) 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, 48200256 + ... + 53050633.

It is an arithmetic number, because the mean of its divisors is an integer number (17248291613280).

Almost surely, 2^{245552542243021} is an apocalyptic number.

It is an amenable number.

245552542243021 is a deficient number, since it is larger than the sum of its proper divisors (30420123569459).

245552542243021 is a wasteful number, since it uses less digits than its factorization.

245552542243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101259036.

The product of its (nonzero) digits is 3840000, while the sum is 46.

Adding to 245552542243021 its reverse (120342245255542), we get a palindrome (365894787498563).

The spelling of 245552542243021 in words is "two hundred forty-five trillion, five hundred fifty-two billion, five hundred forty-two million, two hundred forty-three thousand, twenty-one".