5205217620 has 24 divisors (see below), whose sum is σ = 14574609504. Its totient is φ = 1388058016.

The previous prime is 5205217603. The next prime is 5205217621. The reversal of 5205217620 is 267125025.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205217621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43376754 + ... + 43376873.

It is an arithmetic number, because the mean of its divisors is an integer number (607275396).

Almost surely, 2^5205217620 is an apocalyptic number.

It is an amenable number.

5205217620 is an abundant number, since it is smaller than the sum of its proper divisors (9369391884).

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

5205217620 is a wasteful number, since it uses less digits than its factorization.

5205217620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86753639 (or 86753637 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 5205217620 is about 72147.1941242347. The cubic root of 5205217620 is about 1733.0574665343.

The spelling of 5205217620 in words is "five billion, two hundred five million, two hundred seventeen thousand, six hundred twenty".