2221512151 has 4 divisors (see below), whose sum is σ = 2236224304. Its totient is φ = 2206800000.

The previous prime is 2221512121. The next prime is 2221512169. The reversal of 2221512151 is 1512151222.

It is a happy number.

2221512151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221512151 - 2¹⁷ = 2221381079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221512101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7355850 + ... + 7356151.

It is an arithmetic number, because the mean of its divisors is an integer number (559056076).

Almost surely, 2^2221512151 is an apocalyptic number.

2221512151 is a deficient number, since it is larger than the sum of its proper divisors (14712153).

2221512151 is a wasteful number, since it uses less digits than its factorization.

2221512151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14712152.

The product of its digits is 400, while the sum is 22.

The square root of 2221512151 is about 47132.9200347273. The cubic root of 2221512151 is about 1304.8168738403.

Adding to 2221512151 its reverse (1512151222), we get a palindrome (3733663373).

The spelling of 2221512151 in words is "two billion, two hundred twenty-one million, five hundred twelve thousand, one hundred fifty-one".