61100 has 36 divisors (see below), whose sum is σ = 145824. Its totient is φ = 22080.

The previous prime is 61099. The next prime is 61121. The reversal of 61100 is 116.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1277 + ... + 1323.

2⁶¹¹⁰⁰ 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 61100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72912).

61100 is an abundant number, since it is smaller than the sum of its proper divisors (84724).

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

61100 is a wasteful number, since it uses less digits than its factorization.

61100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 61100 is about 247.1841418862. The cubic root of 61100 is about 39.3864710007.

Adding to 61100 its reverse (116), we get a palindrome (61216).

It can be divided in two parts, 61 and 100, that added together give a palindrome (161).

The spelling of 61100 in words is "sixty-one thousand, one hundred".