61215375 has 64 divisors (see below), whose sum is σ = 113742720. Its totient is φ = 29030400.

The previous prime is 61215373. The next prime is 61215379. The reversal of 61215375 is 57351216.

61215375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61215375 - 2¹ = 61215373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61215373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 141159 + ... + 141591.

It is an arithmetic number, because the mean of its divisors is an integer number (1777230).

Almost surely, 2^61215375 is an apocalyptic number.

61215375 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61215375 is a deficient number, since it is larger than the sum of its proper divisors (52527345).

61215375 is a wasteful number, since it uses less digits than its factorization.

61215375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 483 counting only the distinct ones).

The product of its digits is 6300, while the sum is 30.

The square root of 61215375 is about 7824.0254984247. The cubic root of 61215375 is about 394.1124654249.

The spelling of 61215375 in words is "sixty-one million, two hundred fifteen thousand, three hundred seventy-five".