51142603 has 4 divisors (see below), whose sum is σ = 51171408. Its totient is φ = 51113800.

The previous prime is 51142577. The next prime is 51142607. The reversal of 51142603 is 30624115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30624115 = 5 ⋅6124823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51142603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142607) 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, 11551 + ... + 15352.

It is an arithmetic number, because the mean of its divisors is an integer number (12792852).

Almost surely, 2^51142603 is an apocalyptic number.

51142603 is a deficient number, since it is larger than the sum of its proper divisors (28805).

51142603 is a wasteful number, since it uses less digits than its factorization.

51142603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28804.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51142603 is about 7151.4056660212. The cubic root of 51142603 is about 371.1882978926.

Adding to 51142603 its reverse (30624115), we get a palindrome (81766718).

The spelling of 51142603 in words is "fifty-one million, one hundred forty-two thousand, six hundred three".