2145220416 has 56 divisors (see below), whose sum is σ = 6306555840. Its totient is φ = 715072896.

The previous prime is 2145220411. The next prime is 2145220417. The reversal of 2145220416 is 6140225412.

2145220416 is a `hidden beast` number, since 2 + 1 + 452 + 204 + 1 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2145220416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145220411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618996 + ... + 622451.

Almost surely, 2^2145220416 is an apocalyptic number.

It is an amenable number.

2145220416 is an abundant number, since it is smaller than the sum of its proper divisors (4161335424).

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

2145220416 is a wasteful number, since it uses less digits than its factorization.

2145220416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241468 (or 1241452 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2145220416 is about 46316.5242219232. The cubic root of 2145220416 is about 1289.7057630709.

Adding to 2145220416 its reverse (6140225412), we get a palindrome (8285445828).

The spelling of 2145220416 in words is "two billion, one hundred forty-five million, two hundred twenty thousand, four hundred sixteen".