245213505 has 48 divisors (see below), whose sum is σ = 433465344. Its totient is φ = 128217600.

The previous prime is 245213483. The next prime is 245213509. The reversal of 245213505 is 505312542.

It is a happy number.

245213505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245213505 - 2¹⁷ = 245082433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245213509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 611305 + ... + 611705.

It is an arithmetic number, because the mean of its divisors is an integer number (9030528).

Almost surely, 2^245213505 is an apocalyptic number.

It is an amenable number.

245213505 is a deficient number, since it is larger than the sum of its proper divisors (188251839).

245213505 is a wasteful number, since it uses less digits than its factorization.

245213505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 245213505 is about 15659.2945243392. The cubic root of 245213505 is about 625.9141864358.

The spelling of 245213505 in words is "two hundred forty-five million, two hundred thirteen thousand, five hundred five".