61031860 has 12 divisors (see below), whose sum is σ = 128166948. Its totient is φ = 24412736.

The previous prime is 61031851. The next prime is 61031881. The reversal of 61031860 is 6813016.

61031860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7420176 + 53611684 = 2724^2 + 7322^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1525777 + ... + 1525816.

It is an arithmetic number, because the mean of its divisors is an integer number (10680579).

Almost surely, 2^61031860 is an apocalyptic number.

It is an amenable number.

61031860 is an abundant number, since it is smaller than the sum of its proper divisors (67135088).

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

61031860 is a wasteful number, since it uses less digits than its factorization.

61031860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051602 (or 3051600 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61031860 is about 7812.2890371517. The cubic root of 61031860 is about 393.7182401527.

Adding to 61031860 its reverse (6813016), we get a palindrome (67844876).

The spelling of 61031860 in words is "sixty-one million, thirty-one thousand, eight hundred sixty".