245311350021 has 12 divisors (see below), whose sum is σ = 375182064972. Its totient is φ = 153920846976.

The previous prime is 245311350017. The next prime is 245311350023. The reversal of 245311350021 is 120053113542.

245311350021 is a `hidden beast` number, since 2 + 45 + 3 + 113 + 500 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 112151312100 + 133160037921 = 334890^2 + 364911^2 .

It is not a de Polignac number, because 245311350021 - 2² = 245311350017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245311350023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801670926 + ... + 801671231.

It is an arithmetic number, because the mean of its divisors is an integer number (31265172081).

Almost surely, 2^245311350021 is an apocalyptic number.

It is an amenable number.

245311350021 is a deficient number, since it is larger than the sum of its proper divisors (129870714951).

245311350021 is a wasteful number, since it uses less digits than its factorization.

245311350021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603342180 (or 1603342177 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 245311350021 its reverse (120053113542), we get a palindrome (365364463563).

The spelling of 245311350021 in words is "two hundred forty-five billion, three hundred eleven million, three hundred fifty thousand, twenty-one".