61887315 has 32 divisors (see below), whose sum is σ = 116822016. Its totient is φ = 27377280.

The previous prime is 61887263. The next prime is 61887317. The reversal of 61887315 is 51378816.

61887315 = 2096² + 2097² + ... + 2109².

61887315 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 61887315 - 2¹¹ = 61885267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61887317) 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 31 ways as a sum of consecutive naturals, for example, 6252 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (3650688).

Almost surely, 2^61887315 is an apocalyptic number.

61887315 is a deficient number, since it is larger than the sum of its proper divisors (54934701).

61887315 is a wasteful number, since it uses less digits than its factorization.

61887315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19059.

The product of its digits is 40320, while the sum is 39.

The square root of 61887315 is about 7866.8491151159. The cubic root of 61887315 is about 395.5492332864.

The spelling of 61887315 in words is "sixty-one million, eight hundred eighty-seven thousand, three hundred fifteen".