51042775403 has 4 divisors (see below), whose sum is σ = 51078546120. Its totient is φ = 51007004688.

The previous prime is 51042775367. The next prime is 51042775439. The reversal of 51042775403 is 30457724015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30457724015 = 5 ⋅6091544803.

It is an interprime number because it is at equal distance from previous prime (51042775367) and next prime (51042775439).

It is a cyclic number.

It is not a de Polignac number, because 51042775403 - 2⁶ = 51042775339 is a prime.

It is a super-2 number, since 2×51042775403² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51042775493) 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, 17883218 + ... + 17886071.

It is an arithmetic number, because the mean of its divisors is an integer number (12769636530).

Almost surely, 2^51042775403 is an apocalyptic number.

51042775403 is a deficient number, since it is larger than the sum of its proper divisors (35770717).

51042775403 is a wasteful number, since it uses less digits than its factorization.

51042775403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35770716.

The product of its (nonzero) digits is 117600, while the sum is 38.

The spelling of 51042775403 in words is "fifty-one billion, forty-two million, seven hundred seventy-five thousand, four hundred three".