61331120 has 20 divisors (see below), whose sum is σ = 142595040. Its totient is φ = 24532416.

The previous prime is 61331117. The next prime is 61331129. The reversal of 61331120 is 2113316.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (61331129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383240 + ... + 383399.

It is an arithmetic number, because the mean of its divisors is an integer number (7129752).

Almost surely, 2^61331120 is an apocalyptic number.

It is an amenable number.

61331120 is an abundant number, since it is smaller than the sum of its proper divisors (81263920).

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

61331120 is a wasteful number, since it uses less digits than its factorization.

61331120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766652 (or 766646 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 61331120 is about 7831.4187731215. The cubic root of 61331120 is about 394.3607027734.

Adding to 61331120 its reverse (2113316), we get a palindrome (63444436).

The spelling of 61331120 in words is "sixty-one million, three hundred thirty-one thousand, one hundred twenty".