61633121 has 16 divisors (see below), whose sum is σ = 69431040. Its totient is φ = 54228480.

The previous prime is 61633087. The next prime is 61633139. The reversal of 61633121 is 12133616.

It is a happy number.

61633121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61633121 - 2¹⁰ = 61632097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61633181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49535 + ... + 50763.

It is an arithmetic number, because the mean of its divisors is an integer number (4339440).

Almost surely, 2^61633121 is an apocalyptic number.

It is an amenable number.

61633121 is a deficient number, since it is larger than the sum of its proper divisors (7797919).

61633121 is a wasteful number, since it uses less digits than its factorization.

61633121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 648, while the sum is 23.

The square root of 61633121 is about 7850.6764676682. The cubic root of 61633121 is about 395.0069346643.

Adding to 61633121 its reverse (12133616), we get a palindrome (73766737).

The spelling of 61633121 in words is "sixty-one million, six hundred thirty-three thousand, one hundred twenty-one".