2661432215 has 16 divisors (see below), whose sum is σ = 3460503648. Its totient is φ = 1953300096.

The previous prime is 2661432203. The next prime is 2661432227. The reversal of 2661432215 is 5122341662.

It is an interprime number because it is at equal distance from previous prime (2661432203) and next prime (2661432227).

It is a cyclic number.

It is not a de Polignac number, because 2661432215 - 2¹⁶ = 2661366679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115004 + ... + 136193.

It is an arithmetic number, because the mean of its divisors is an integer number (216281478).

Almost surely, 2^2661432215 is an apocalyptic number.

2661432215 is a deficient number, since it is larger than the sum of its proper divisors (799071433).

2661432215 is a wasteful number, since it uses less digits than its factorization.

2661432215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251378.

The product of its digits is 17280, while the sum is 32.

The square root of 2661432215 is about 51589.0706933164. The cubic root of 2661432215 is about 1385.8146128541.

Adding to 2661432215 its reverse (5122341662), we get a palindrome (7783773877).

The spelling of 2661432215 in words is "two billion, six hundred sixty-one million, four hundred thirty-two thousand, two hundred fifteen".