51000432553 has 32 divisors (see below), whose sum is σ = 63917162496. Its totient is φ = 39737573568.

The previous prime is 51000432541. The next prime is 51000432577. The reversal of 51000432553 is 35523400015.

It is not a de Polignac number, because 51000432553 - 2²⁵ = 50966878121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51000432523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156600 + ... + 355702.

It is an arithmetic number, because the mean of its divisors is an integer number (1997411328).

Almost surely, 2^51000432553 is an apocalyptic number.

It is an amenable number.

51000432553 is a deficient number, since it is larger than the sum of its proper divisors (12916729943).

51000432553 is a wasteful number, since it uses less digits than its factorization.

51000432553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199213.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 51000432553 its reverse (35523400015), we get a palindrome (86523832568).

The spelling of 51000432553 in words is "fifty-one billion, four hundred thirty-two thousand, five hundred fifty-three".