61320115 has 4 divisors (see below), whose sum is σ = 73584144. Its totient is φ = 49056088.

The previous prime is 61320097. The next prime is 61320131. The reversal of 61320115 is 51102316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61320115 - 2⁹ = 61319603 is a prime.

It is a super-2 number, since 2×61320115² = 7520313007226450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61320092 and 61320101.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6132007 + ... + 6132016.

It is an arithmetic number, because the mean of its divisors is an integer number (18396036).

Almost surely, 2^61320115 is an apocalyptic number.

61320115 is a deficient number, since it is larger than the sum of its proper divisors (12264029).

61320115 is a wasteful number, since it uses less digits than its factorization.

61320115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12264028.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61320115 is about 7830.7161230631. The cubic root of 61320115 is about 394.3371138834.

The spelling of 61320115 in words is "sixty-one million, three hundred twenty thousand, one hundred fifteen".