61133830 has 16 divisors (see below), whose sum is σ = 115832880. Its totient is φ = 23166432.

The previous prime is 61133803. The next prime is 61133851. The reversal of 61133830 is 3833116.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61133795 and 61133804.

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 7 ways as a sum of consecutive naturals, for example, 160689 + ... + 161068.

It is an arithmetic number, because the mean of its divisors is an integer number (7239555).

Almost surely, 2^61133830 is an apocalyptic number.

61133830 is a deficient number, since it is larger than the sum of its proper divisors (54699050).

61133830 is a wasteful number, since it uses less digits than its factorization.

61133830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321783.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 61133830 is about 7818.8125696937. The cubic root of 61133830 is about 393.9373885924.

Adding to 61133830 its reverse (3833116), we get a palindrome (64966946).

The spelling of 61133830 in words is "sixty-one million, one hundred thirty-three thousand, eight hundred thirty".