51604135203 has 16 divisors (see below), whose sum is σ = 69000362496. Its totient is φ = 34305408480.

The previous prime is 51604135199. The next prime is 51604135207. The reversal of 51604135203 is 30253140615.

It is an interprime number because it is at equal distance from previous prime (51604135199) and next prime (51604135207).

It is not a de Polignac number, because 51604135203 - 2² = 51604135199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51604135207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3203776 + ... + 3219842.

It is an arithmetic number, because the mean of its divisors is an integer number (4312522656).

Almost surely, 2^51604135203 is an apocalyptic number.

51604135203 is a deficient number, since it is larger than the sum of its proper divisors (17396227293).

51604135203 is a wasteful number, since it uses less digits than its factorization.

51604135203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19034.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 51604135203 its reverse (30253140615), we get a palindrome (81857275818).

The spelling of 51604135203 in words is "fifty-one billion, six hundred four million, one hundred thirty-five thousand, two hundred three".