245511352054121 has 4 divisors (see below), whose sum is σ = 245511396730500. Its totient is φ = 245511307377744.

The previous prime is 245511352054117. The next prime is 245511352054123. The reversal of 245511352054121 is 121450253115542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 139282483240000 + 106228868814121 = 11801800^2 + 10306739^2 .

It is a cyclic number.

It is not a de Polignac number, because 245511352054121 - 2² = 245511352054117 is a prime.

It is a super-2 number, since 2×245511352054121² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245511352054123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12712646 + ... + 25546703.

It is an arithmetic number, because the mean of its divisors is an integer number (61377849182625).

Almost surely, 2^{245511352054121} is an apocalyptic number.

It is an amenable number.

245511352054121 is a deficient number, since it is larger than the sum of its proper divisors (44676379).

245511352054121 is an equidigital number, since it uses as much as digits as its factorization.

245511352054121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44676378.

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 245511352054121 in words is "two hundred forty-five trillion, five hundred eleven billion, three hundred fifty-two million, fifty-four thousand, one hundred twenty-one".