245220013 has 16 divisors (see below), whose sum is σ = 262766592. Its totient is φ = 228438000.

The previous prime is 245220011. The next prime is 245220037. The reversal of 245220013 is 310022542.

It is a cyclic number.

It is not a de Polignac number, because 245220013 - 2¹ = 245220011 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 (245220011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93348 + ... + 95938.

It is an arithmetic number, because the mean of its divisors is an integer number (16422912).

Almost surely, 2^245220013 is an apocalyptic number.

It is an amenable number.

245220013 is a deficient number, since it is larger than the sum of its proper divisors (17546579).

245220013 is a wasteful number, since it uses less digits than its factorization.

245220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 245220013 is about 15659.5023228709. The cubic root of 245220013 is about 625.9197236695.

Adding to 245220013 its reverse (310022542), we get a palindrome (555242555).

The spelling of 245220013 in words is "two hundred forty-five million, two hundred twenty thousand, thirteen".