2221510155 has 16 divisors (see below), whose sum is σ = 3650482464. Its totient is φ = 1152783360.

The previous prime is 2221510121. The next prime is 2221510157. The reversal of 2221510155 is 5510151222.

It is not a de Polignac number, because 2221510155 - 2⁹ = 2221509643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221510157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2000806 + ... + 2001915.

It is an arithmetic number, because the mean of its divisors is an integer number (228155154).

Almost surely, 2^2221510155 is an apocalyptic number.

2221510155 is a deficient number, since it is larger than the sum of its proper divisors (1428972309).

2221510155 is a wasteful number, since it uses less digits than its factorization.

2221510155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002766.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2221510155 is about 47132.8988605624. The cubic root of 2221510155 is about 1304.8164830532.

Adding to 2221510155 its reverse (5510151222), we get a palindrome (7731661377).

The spelling of 2221510155 in words is "two billion, two hundred twenty-one million, five hundred ten thousand, one hundred fifty-five".