61305203 has 4 divisors (see below), whose sum is σ = 61695840. Its totient is φ = 60914568.

The previous prime is 61305187. The next prime is 61305221. The reversal of 61305203 is 30250316.

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 61305203 - 2⁴ = 61305187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61305403) 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, 195083 + ... + 195396.

It is an arithmetic number, because the mean of its divisors is an integer number (15423960).

Almost surely, 2^61305203 is an apocalyptic number.

61305203 is a deficient number, since it is larger than the sum of its proper divisors (390637).

61305203 is a wasteful number, since it uses less digits than its factorization.

61305203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390636.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 61305203 is about 7829.7639172583. The cubic root of 61305203 is about 394.3051459515.

Adding to 61305203 its reverse (30250316), we get a palindrome (91555519).

The spelling of 61305203 in words is "sixty-one million, three hundred five thousand, two hundred three".