61855315 has 8 divisors (see below), whose sum is σ = 74269440. Its totient is φ = 49455552.

The previous prime is 61855291. The next prime is 61855319. The reversal of 61855315 is 51355816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61855315 - 2⁹ = 61854803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61855319) 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 7 ways as a sum of consecutive naturals, for example, 12247 + ... + 16543.

It is an arithmetic number, because the mean of its divisors is an integer number (9283680).

Almost surely, 2^61855315 is an apocalyptic number.

61855315 is a deficient number, since it is larger than the sum of its proper divisors (12414125).

61855315 is a wasteful number, since it uses less digits than its factorization.

61855315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7181.

The product of its digits is 18000, while the sum is 34.

The square root of 61855315 is about 7864.8150010029. The cubic root of 61855315 is about 395.4810461428.

The spelling of 61855315 in words is "sixty-one million, eight hundred fifty-five thousand, three hundred fifteen".