61081230 has 64 divisors (see below), whose sum is σ = 168376320. Its totient is φ = 13891584.

The previous prime is 61081213. The next prime is 61081243. The reversal of 61081230 is 3218016.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61081197 and 61081206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49582 + ... + 50798.

It is an arithmetic number, because the mean of its divisors is an integer number (2630880).

Almost surely, 2^61081230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61081230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84188160).

61081230 is an abundant number, since it is smaller than the sum of its proper divisors (107295090).

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

61081230 is a wasteful number, since it uses less digits than its factorization.

61081230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61081230 is about 7815.4481637332. The cubic root of 61081230 is about 393.8243739580.

Adding to 61081230 its reverse (3218016), we get a palindrome (64299246).

The spelling of 61081230 in words is "sixty-one million, eighty-one thousand, two hundred thirty".