245220816 has 20 divisors (see below), whose sum is σ = 633487232. Its totient is φ = 81740256.

The previous prime is 245220769. The next prime is 245220817. The reversal of 245220816 is 618022542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245220817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2554336 + ... + 2554431.

Almost surely, 2^245220816 is an apocalyptic number.

It is an amenable number.

245220816 is an abundant number, since it is smaller than the sum of its proper divisors (388266416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245220816 is a wasteful number, since it uses less digits than its factorization.

245220816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108778 (or 5108772 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 245220816 is about 15659.5279622344. The cubic root of 245220816 is about 625.9204068832.

The spelling of 245220816 in words is "two hundred forty-five million, two hundred twenty thousand, eight hundred sixteen".