61215150 has 96 divisors (see below), whose sum is σ = 163560960. Its totient is φ = 15102720.

The previous prime is 61215149. The next prime is 61215157. The reversal of 61215150 is 5151216.

61215150 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61215157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133722 + ... + 134178.

It is an arithmetic number, because the mean of its divisors is an integer number (1703760).

Almost surely, 2^61215150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61215150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81780480).

61215150 is an abundant number, since it is smaller than the sum of its proper divisors (102345810).

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

61215150 is a wasteful number, since it uses less digits than its factorization.

61215150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 61215150 is about 7824.0111196240. The cubic root of 61215150 is about 394.1119825646. Note that the first 3 decimals are identical.

Adding to 61215150 its reverse (5151216), we get a palindrome (66366366).

The spelling of 61215150 in words is "sixty-one million, two hundred fifteen thousand, one hundred fifty".