61345513 has 4 divisors (see below), whose sum is σ = 61409920. Its totient is φ = 61281108.

The previous prime is 61345511. The next prime is 61345573. The reversal of 61345513 is 31554316.

61345513 is nontrivially palindromic in base 6.

61345513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61345513 - 2¹ = 61345511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61345511) 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 3 ways as a sum of consecutive naturals, for example, 30753 + ... + 32686.

It is an arithmetic number, because the mean of its divisors is an integer number (15352480).

Almost surely, 2^61345513 is an apocalyptic number.

It is an amenable number.

61345513 is a deficient number, since it is larger than the sum of its proper divisors (64407).

61345513 is an equidigital number, since it uses as much as digits as its factorization.

61345513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64406.

The product of its digits is 5400, while the sum is 28.

The square root of 61345513 is about 7832.3376459394. The cubic root of 61345513 is about 394.3915494824.

Adding to 61345513 its reverse (31554316), we get a palindrome (92899829).

The spelling of 61345513 in words is "sixty-one million, three hundred forty-five thousand, five hundred thirteen".