245312521111 has 16 divisors (see below), whose sum is σ = 283470255936. Its totient is φ = 207936470016.

The previous prime is 245312521067. The next prime is 245312521127. The reversal of 245312521111 is 111125213542.

It is a cyclic number.

It is not a de Polignac number, because 245312521111 - 2⁹ = 245312520599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245312521111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245312521411) 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, 725625 + ... + 1008541.

It is an arithmetic number, because the mean of its divisors is an integer number (17716890996).

Almost surely, 2^245312521111 is an apocalyptic number.

245312521111 is a deficient number, since it is larger than the sum of its proper divisors (38157734825).

245312521111 is a wasteful number, since it uses less digits than its factorization.

245312521111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284298.

The product of its digits is 2400, while the sum is 28.

Adding to 245312521111 its reverse (111125213542), we get a palindrome (356437734653).

The spelling of 245312521111 in words is "two hundred forty-five billion, three hundred twelve million, five hundred twenty-one thousand, one hundred eleven".