61515523 has 2 divisors, whose sum is σ = 61515524. Its totient is φ = 61515522.

The previous prime is 61515481. The next prime is 61515541. The reversal of 61515523 is 32551516.

61515523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61515523 - 2¹⁷ = 61384451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61515491 and 61515500.

It is not a weakly prime, because it can be changed into another prime (61525523) 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 as a sum of consecutive naturals, namely, 30757761 + 30757762.

It is an arithmetic number, because the mean of its divisors is an integer number (30757762).

Almost surely, 2^61515523 is an apocalyptic number.

61515523 is a deficient number, since it is larger than the sum of its proper divisors (1).

61515523 is an equidigital number, since it uses as much as digits as its factorization.

61515523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 61515523 is about 7843.1832185663. The cubic root of 61515523 is about 394.7555460165.

The spelling of 61515523 in words is "sixty-one million, five hundred fifteen thousand, five hundred twenty-three".