2215603261 has 8 divisors (see below), whose sum is σ = 2228238144. Its totient is φ = 2203000800.

The previous prime is 2215603241. The next prime is 2215603267. The reversal of 2215603261 is 1623065122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2215603261 - 2¹³ = 2215595069 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 (2215603267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136161 + ... + 151561.

It is an arithmetic number, because the mean of its divisors is an integer number (278529768).

Almost surely, 2^2215603261 is an apocalyptic number.

It is an amenable number.

2215603261 is a deficient number, since it is larger than the sum of its proper divisors (12634883).

2215603261 is a wasteful number, since it uses less digits than its factorization.

2215603261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16211.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2215603261 is about 47070.1950388991. The cubic root of 2215603261 is about 1303.6589740548.

Adding to 2215603261 its reverse (1623065122), we get a palindrome (3838668383).

The spelling of 2215603261 in words is "two billion, two hundred fifteen million, six hundred three thousand, two hundred sixty-one".