61328331 has 6 divisors (see below), whose sum is σ = 88585380. Its totient is φ = 40885548.

The previous prime is 61328321. The next prime is 61328357. The reversal of 61328331 is 13382316.

It is a happy number.

61328331 is a `hidden beast` number, since 6 + 1 + 328 + 331 = 666.

It is not a de Polignac number, because 61328331 - 2²⁵ = 27773899 is a prime.

It is a super-2 number, since 2×61328331² = 7522328366491122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61328295 and 61328304.

It is not an unprimeable number, because it can be changed into a prime (61328321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3407121 + ... + 3407138.

It is an arithmetic number, because the mean of its divisors is an integer number (14764230).

Almost surely, 2^61328331 is an apocalyptic number.

61328331 is a deficient number, since it is larger than the sum of its proper divisors (27257049).

61328331 is a wasteful number, since it uses less digits than its factorization.

61328331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814265 (or 6814262 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 61328331 is about 7831.2407062994. The cubic root of 61328331 is about 394.3547249019.

The spelling of 61328331 in words is "sixty-one million, three hundred twenty-eight thousand, three hundred thirty-one".