61530523 has 4 divisors (see below), whose sum is σ = 61849528. Its totient is φ = 61211520.

The previous prime is 61530503. The next prime is 61530527. The reversal of 61530523 is 32503516.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61530523 - 2⁹ = 61530011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61530527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159213 + ... + 159598.

It is an arithmetic number, because the mean of its divisors is an integer number (15462382).

Almost surely, 2^61530523 is an apocalyptic number.

61530523 is a deficient number, since it is larger than the sum of its proper divisors (319005).

61530523 is a wasteful number, since it uses less digits than its factorization.

61530523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319004.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 61530523 is about 7844.1394046766. The cubic root of 61530523 is about 394.7876292571.

The spelling of 61530523 in words is "sixty-one million, five hundred thirty thousand, five hundred twenty-three".