61353503 has 4 divisors (see below), whose sum is σ = 61696440. Its totient is φ = 61010568.

The previous prime is 61353497. The next prime is 61353521. The reversal of 61353503 is 30535316.

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 61353503 - 2¹⁰ = 61352479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61353583) 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, 171200 + ... + 171557.

It is an arithmetic number, because the mean of its divisors is an integer number (15424110).

Almost surely, 2^61353503 is an apocalyptic number.

61353503 is a deficient number, since it is larger than the sum of its proper divisors (342937).

61353503 is a wasteful number, since it uses less digits than its factorization.

61353503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342936.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 61353503 is about 7832.8476941659. The cubic root of 61353503 is about 394.4086713632.

Adding to 61353503 its reverse (30535316), we get a palindrome (91888819).

The spelling of 61353503 in words is "sixty-one million, three hundred fifty-three thousand, five hundred three".