2145213210 has 64 divisors (see below), whose sum is σ = 5923067904. Its totient is φ = 487080000.

The previous prime is 2145213173. The next prime is 2145213211. The reversal of 2145213210 is 123125412.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2145213211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2116 + ... + 65535.

It is an arithmetic number, because the mean of its divisors is an integer number (92547936).

Almost surely, 2^2145213210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145213210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2961533952).

2145213210 is an abundant number, since it is smaller than the sum of its proper divisors (3777854694).

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

2145213210 is a wasteful number, since it uses less digits than its factorization.

2145213210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67819.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2145213210 is about 46316.4464310465. The cubic root of 2145213210 is about 1289.7043189877.

Adding to 2145213210 its reverse (123125412), we get a palindrome (2268338622).

The spelling of 2145213210 in words is "two billion, one hundred forty-five million, two hundred thirteen thousand, two hundred ten".