2215525321 has 2 divisors, whose sum is σ = 2215525322. Its totient is φ = 2215525320.

The previous prime is 2215525313. The next prime is 2215525337. The reversal of 2215525321 is 1235255122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2214643600 + 881721 = 47060^2 + 939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215525321 - 2³ = 2215525313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2215525321.

It is not a weakly prime, because it can be changed into another prime (2215525021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107762660 + 1107762661.

It is an arithmetic number, because the mean of its divisors is an integer number (1107762661).

Almost surely, 2^2215525321 is an apocalyptic number.

It is an amenable number.

2215525321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215525321 is an equidigital number, since it uses as much as digits as its factorization.

2215525321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 28.

The square root of 2215525321 is about 47069.3671191785. The cubic root of 2215525321 is about 1303.6436872668.

The spelling of 2215525321 in words is "two billion, two hundred fifteen million, five hundred twenty-five thousand, three hundred twenty-one".