61519523 has 4 divisors (see below), whose sum is σ = 66251808. Its totient is φ = 56787240.

The previous prime is 61519519. The next prime is 61519553. The reversal of 61519523 is 32591516.

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 61519523 - 2² = 61519519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61519523.

It is not an unprimeable number, because it can be changed into a prime (61519553) 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, 2366123 + ... + 2366148.

It is an arithmetic number, because the mean of its divisors is an integer number (16562952).

Almost surely, 2^61519523 is an apocalyptic number.

61519523 is a deficient number, since it is larger than the sum of its proper divisors (4732285).

61519523 is a wasteful number, since it uses less digits than its factorization.

61519523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732284.

The product of its digits is 8100, while the sum is 32.

The square root of 61519523 is about 7843.4382129268. The cubic root of 61519523 is about 394.7641020572.

The spelling of 61519523 in words is "sixty-one million, five hundred nineteen thousand, five hundred twenty-three".