61051603 has 4 divisors (see below), whose sum is σ = 61072480. Its totient is φ = 61030728.

The previous prime is 61051577. The next prime is 61051619. The reversal of 61051603 is 30615016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61051603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61051103) 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, 5163 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (15268120).

Almost surely, 2^61051603 is an apocalyptic number.

61051603 is a deficient number, since it is larger than the sum of its proper divisors (20877).

61051603 is a wasteful number, since it uses less digits than its factorization.

61051603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20876.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 61051603 is about 7813.5525211008. The cubic root of 61051603 is about 393.7606897912.

Adding to 61051603 its reverse (30615016), we get a palindrome (91666619).

The spelling of 61051603 in words is "sixty-one million, fifty-one thousand, six hundred three".