245223613 has 4 divisors (see below), whose sum is σ = 245275708. Its totient is φ = 245171520.

The previous prime is 245223607. The next prime is 245223653. The reversal of 245223613 is 316322542.

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 179077924 + 66145689 = 13382^2 + 8133^2 .

It is a cyclic number.

It is not a de Polignac number, because 245223613 - 2²¹ = 243126461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245223653) 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 3 ways as a sum of consecutive naturals, for example, 18198 + ... + 28663.

It is an arithmetic number, because the mean of its divisors is an integer number (61318927).

Almost surely, 2^245223613 is an apocalyptic number.

It is an amenable number.

245223613 is a deficient number, since it is larger than the sum of its proper divisors (52095).

245223613 is an equidigital number, since it uses as much as digits as its factorization.

245223613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52094.

The product of its digits is 8640, while the sum is 28.

The square root of 245223613 is about 15659.6172686308. The cubic root of 245223613 is about 625.9227866332.

The spelling of 245223613 in words is "two hundred forty-five million, two hundred twenty-three thousand, six hundred thirteen".