3261615225 has 24 divisors (see below), whose sum is σ = 5882769312. Its totient is φ = 1581388800.

The previous prime is 3261615209. The next prime is 3261615241. The reversal of 3261615225 is 5225161623.

It is an interprime number because it is at equal distance from previous prime (3261615209) and next prime (3261615241).

It is not a de Polignac number, because 3261615225 - 2⁴ = 3261615209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975912 + ... + 1977561.

It is an arithmetic number, because the mean of its divisors is an integer number (245115388).

Almost surely, 2^3261615225 is an apocalyptic number.

It is an amenable number.

3261615225 is a deficient number, since it is larger than the sum of its proper divisors (2621154087).

3261615225 is a wasteful number, since it uses less digits than its factorization.

3261615225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953497 (or 3953492 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 3261615225 is about 57110.5526588563. The cubic root of 3261615225 is about 1483.0105545481.

Adding to 3261615225 its reverse (5225161623), we get a palindrome (8486776848).

The spelling of 3261615225 in words is "three billion, two hundred sixty-one million, six hundred fifteen thousand, two hundred twenty-five".