61915 has 16 divisors (see below), whose sum is σ = 89280. Its totient is φ = 40320.

The previous prime is 61909. The next prime is 61927. The reversal of 61915 is 51916.

It is not a de Polignac number, because 61915 - 2⁹ = 61403 is a prime.

61915 is a lucky number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985 + ... + 1045.

It is an arithmetic number, because the mean of its divisors is an integer number (5580).

2⁶¹⁹¹⁵ is an apocalyptic number.

61915 is a deficient number, since it is larger than the sum of its proper divisors (27365).

61915 is a wasteful number, since it uses less digits than its factorization.

61915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102.

The product of its digits is 270, while the sum is 22.

The square root of 61915 is about 248.8272493116. The cubic root of 61915 is about 39.5608206858.

Subtracting from 61915 its reverse (51916), we obtain a palindrome (9999).

The spelling of 61915 in words is "sixty-one thousand, nine hundred fifteen".