61545281 has 8 divisors (see below), whose sum is σ = 71021184. Its totient is φ = 52240320.

The previous prime is 61545277. The next prime is 61545301. The reversal of 61545281 is 18254516.

61545281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61545281 - 2² = 61545277 is a prime.

It is a super-2 number, since 2×61545281² = 7575643226737922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61545271) 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 7 ways as a sum of consecutive naturals, for example, 41960 + ... + 43401.

It is an arithmetic number, because the mean of its divisors is an integer number (8877648).

Almost surely, 2^61545281 is an apocalyptic number.

It is an amenable number.

61545281 is a deficient number, since it is larger than the sum of its proper divisors (9475903).

61545281 is a wasteful number, since it uses less digits than its factorization.

61545281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85471.

The product of its digits is 9600, while the sum is 32.

The square root of 61545281 is about 7845.0800505795. The cubic root of 61545281 is about 394.8191897997.

Adding to 61545281 its reverse (18254516), we get a palindrome (79799797).

The spelling of 61545281 in words is "sixty-one million, five hundred forty-five thousand, two hundred eighty-one".