61100312 has 64 divisors (see below), whose sum is σ = 149325120. Its totient is φ = 22745088.

The previous prime is 61100311. The next prime is 61100323. The reversal of 61100312 is 21300116.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61100311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9908 + ... + 14844.

It is an arithmetic number, because the mean of its divisors is an integer number (2333205).

Almost surely, 2^61100312 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 61100312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74662560).

61100312 is an abundant number, since it is smaller than the sum of its proper divisors (88224808).

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

61100312 is a wasteful number, since it uses less digits than its factorization.

61100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980 (or 4976 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 61100312 is about 7816.6688557211. The cubic root of 61100312 is about 393.8653804137.

Adding to 61100312 its reverse (21300116), we get a palindrome (82400428).

The spelling of 61100312 in words is "sixty-one million, one hundred thousand, three hundred twelve".