61215108 has 12 divisors (see below), whose sum is σ = 142835280. Its totient is φ = 20405032.

The previous prime is 61215107. The next prime is 61215127. The reversal of 61215108 is 80151216.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61215107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550618 + ... + 2550641.

It is an arithmetic number, because the mean of its divisors is an integer number (11902940).

Almost surely, 2^61215108 is an apocalyptic number.

It is an amenable number.

61215108 is an abundant number, since it is smaller than the sum of its proper divisors (81620172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61215108 is a wasteful number, since it uses less digits than its factorization.

61215108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101266 (or 5101264 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 61215108 is about 7824.0084355783. The cubic root of 61215108 is about 394.1118924306. Note that the first 3 decimals are identical.

The spelling of 61215108 in words is "sixty-one million, two hundred fifteen thousand, one hundred eight".