245215073 has 2 divisors, whose sum is σ = 245215074. Its totient is φ = 245215072.

The previous prime is 245215063. The next prime is 245215079. The reversal of 245215073 is 370512542.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241243024 + 3972049 = 15532^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 245215073 - 2⁴ = 245215057 is a prime.

It is equal to p_13431791 and since 245215073 and 13431791 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (245215079) 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 as a sum of consecutive naturals, namely, 122607536 + 122607537.

It is an arithmetic number, because the mean of its divisors is an integer number (122607537).

Almost surely, 2^245215073 is an apocalyptic number.

It is an amenable number.

245215073 is a deficient number, since it is larger than the sum of its proper divisors (1).

245215073 is an equidigital number, since it uses as much as digits as its factorization.

245215073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 245215073 is about 15659.3445903716. The cubic root of 245215073 is about 625.9155205539.

The spelling of 245215073 in words is "two hundred forty-five million, two hundred fifteen thousand, seventy-three".