61816315 has 32 divisors (see below), whose sum is σ = 84188160. Its totient is φ = 43180800.

The previous prime is 61816303. The next prime is 61816319. The reversal of 61816315 is 51361816.

It is not a de Polignac number, because 61816315 - 2¹⁷ = 61685243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61816319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177972 + ... + 178318.

It is an arithmetic number, because the mean of its divisors is an integer number (2630880).

Almost surely, 2^61816315 is an apocalyptic number.

61816315 is a deficient number, since it is larger than the sum of its proper divisors (22371845).

61816315 is a wasteful number, since it uses less digits than its factorization.

61816315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483.

The product of its digits is 4320, while the sum is 31.

The square root of 61816315 is about 7862.3352128995. The cubic root of 61816315 is about 395.3979112577.

The spelling of 61816315 in words is "sixty-one million, eight hundred sixteen thousand, three hundred fifteen".