2221215210 has 40 divisors (see below), whose sum is σ = 5972603076. Its totient is φ = 592323840.

The previous prime is 2221215187. The next prime is 2221215239. The reversal of 2221215210 is 125121222.

2221215210 is a `hidden beast` number, since 2 + 22 + 121 + 521 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2216432241 + 4782969 = 47079^2 + 2187^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1370311 + ... + 1371930.

Almost surely, 2^2221215210 is an apocalyptic number.

2221215210 is an abundant number, since it is smaller than the sum of its proper divisors (3751387866).

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

2221215210 is a wasteful number, since it uses less digits than its factorization.

2221215210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742260 (or 2742251 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2221215210 is about 47129.7698912269. The cubic root of 2221215210 is about 1304.7587346292.

Adding to 2221215210 its reverse (125121222), we get a palindrome (2346336432).

The spelling of 2221215210 in words is "two billion, two hundred twenty-one million, two hundred fifteen thousand, two hundred ten".