51061603 has 4 divisors (see below), whose sum is σ = 51081400. Its totient is φ = 51041808.

The previous prime is 51061601. The next prime is 51061613. The reversal of 51061603 is 30616015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30616015 = 5 ⋅6123203.

It is a cyclic number.

It is not a de Polignac number, because 51061603 - 2¹ = 51061601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51061601) 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, 5325 + ... + 11422.

It is an arithmetic number, because the mean of its divisors is an integer number (12770350).

Almost surely, 2^51061603 is an apocalyptic number.

51061603 is a deficient number, since it is larger than the sum of its proper divisors (19797).

51061603 is a wasteful number, since it uses less digits than its factorization.

51061603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19796.

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

The square root of 51061603 is about 7145.7401995874. The cubic root of 51061603 is about 370.9922308344.

Adding to 51061603 its reverse (30616015), we get a palindrome (81677618).

The spelling of 51061603 in words is "fifty-one million, sixty-one thousand, six hundred three".