245120555243 has 4 divisors (see below), whose sum is σ = 245308965888. Its totient is φ = 244932144600.

The previous prime is 245120555237. The next prime is 245120555269. The reversal of 245120555243 is 342555021542.

245120555243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245120555243 - 2¹² = 245120551147 is a prime.

It is a super-2 number, since 2×245120555243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245120555197 and 245120555206.

It is not an unprimeable number, because it can be changed into a prime (245120555203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94203371 + ... + 94205972.

It is an arithmetic number, because the mean of its divisors is an integer number (61327241472).

Almost surely, 2^245120555243 is an apocalyptic number.

245120555243 is a deficient number, since it is larger than the sum of its proper divisors (188410645).

245120555243 is a wasteful number, since it uses less digits than its factorization.

245120555243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188410644.

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 245120555243 its reverse (342555021542), we get a palindrome (587675576785).

The spelling of 245120555243 in words is "two hundred forty-five billion, one hundred twenty million, five hundred fifty-five thousand, two hundred forty-three".