245553421133 has 2 divisors, whose sum is σ = 245553421134. Its totient is φ = 245553421132.

The previous prime is 245553421103. The next prime is 245553421189. The reversal of 245553421133 is 331124355542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237654300004 + 7899121129 = 487498^2 + 88877^2 .

It is a cyclic number.

It is not a de Polignac number, because 245553421133 - 2²⁰ = 245552372557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245553421103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122776710566 + 122776710567.

It is an arithmetic number, because the mean of its divisors is an integer number (122776710567).

Almost surely, 2^245553421133 is an apocalyptic number.

It is an amenable number.

245553421133 is a deficient number, since it is larger than the sum of its proper divisors (1).

245553421133 is an equidigital number, since it uses as much as digits as its factorization.

245553421133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 38.

Adding to 245553421133 its reverse (331124355542), we get a palindrome (576677776675).

The spelling of 245553421133 in words is "two hundred forty-five billion, five hundred fifty-three million, four hundred twenty-one thousand, one hundred thirty-three".