61528315 has 16 divisors (see below), whose sum is σ = 75243168. Its totient is φ = 48292096.

The previous prime is 61528309. The next prime is 61528319. The reversal of 61528315 is 51382516.

It is a cyclic number.

It is not a de Polignac number, because 61528315 - 2⁹ = 61527803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61528319) 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 15 ways as a sum of consecutive naturals, for example, 71367 + ... + 72223.

It is an arithmetic number, because the mean of its divisors is an integer number (4702698).

Almost surely, 2^61528315 is an apocalyptic number.

61528315 is a deficient number, since it is larger than the sum of its proper divisors (13714853).

61528315 is a wasteful number, since it uses less digits than its factorization.

61528315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118.

The product of its digits is 7200, while the sum is 31.

The square root of 61528315 is about 7843.9986613971. The cubic root of 61528315 is about 394.7829069314.

The spelling of 61528315 in words is "sixty-one million, five hundred twenty-eight thousand, three hundred fifteen".