61331075 has 12 divisors (see below), whose sum is σ = 81901008. Its totient is φ = 45290400.

The previous prime is 61330999. The next prime is 61331077. The reversal of 61331075 is 57013316.

It is a happy number.

It is not a de Polignac number, because 61331075 - 2¹⁰ = 61330051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61331077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94031 + ... + 94680.

It is an arithmetic number, because the mean of its divisors is an integer number (6825084).

Almost surely, 2^61331075 is an apocalyptic number.

61331075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61331075 is a deficient number, since it is larger than the sum of its proper divisors (20569933).

61331075 is a wasteful number, since it uses less digits than its factorization.

61331075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188734 (or 188729 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 61331075 is about 7831.4159000784. The cubic root of 61331075 is about 394.3606063230.

The spelling of 61331075 in words is "sixty-one million, three hundred thirty-one thousand, seventy-five".