61112172 has 48 divisors (see below), whose sum is σ = 156304512. Its totient is φ = 18430080.

The previous prime is 61112167. The next prime is 61112203. The reversal of 61112172 is 27121116.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29763 + ... + 31749.

It is an arithmetic number, because the mean of its divisors is an integer number (3256344).

Almost surely, 2^61112172 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 61112172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78152256).

61112172 is an abundant number, since it is smaller than the sum of its proper divisors (95192340).

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

61112172 is a wasteful number, since it uses less digits than its factorization.

61112172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238 (or 2236 counting only the distinct ones).

The product of its digits is 168, while the sum is 21.

The square root of 61112172 is about 7817.4274540926. The cubic root of 61112172 is about 393.8908627779.

Adding to 61112172 its reverse (27121116), we get a palindrome (88233288).

The spelling of 61112172 in words is "sixty-one million, one hundred twelve thousand, one hundred seventy-two".