61105212 has 96 divisors (see below), whose sum is σ = 182730240. Its totient is φ = 17297280.

The previous prime is 61105207. The next prime is 61105223. The reversal of 61105212 is 21250116.

61105212 is a `hidden beast` number, since 611 + 0 + 52 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98728 + ... + 99344.

It is an arithmetic number, because the mean of its divisors is an integer number (1903440).

Almost surely, 2^61105212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61105212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91365120).

61105212 is an abundant number, since it is smaller than the sum of its proper divisors (121625028).

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

61105212 is a wasteful number, since it uses less digits than its factorization.

61105212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61105212 is about 7816.9822821854. The cubic root of 61105212 is about 393.8759089403.

Adding to 61105212 its reverse (21250116), we get a palindrome (82355328).

The spelling of 61105212 in words is "sixty-one million, one hundred five thousand, two hundred twelve".