245215620 has 144 divisors (see below), whose sum is σ = 826398720. Its totient is φ = 60338304.

The previous prime is 245215609. The next prime is 245215661. The reversal of 245215620 is 26512542.

245215620 is a `hidden beast` number, since 24 + 5 + 2 + 15 + 620 = 666.

245215620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89917 + ... + 92603.

It is an arithmetic number, because the mean of its divisors is an integer number (5738880).

Almost surely, 2^245215620 is an apocalyptic number.

245215620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245215620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413199360).

245215620 is an abundant number, since it is smaller than the sum of its proper divisors (581183100).

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

245215620 is a wasteful number, since it uses less digits than its factorization.

245215620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 245215620 is about 15659.3620559715. The cubic root of 245215620 is about 625.9159859624.

The spelling of 245215620 in words is "two hundred forty-five million, two hundred fifteen thousand, six hundred twenty".