51432505501 has 8 divisors (see below), whose sum is σ = 55393037784. Its totient is φ = 47472571200.

The previous prime is 51432505471. The next prime is 51432505513. The reversal of 51432505501 is 10550523415.

It can be written as a sum of positive squares in 4 ways, for example, as 40068900 + 51392436601 = 6330^2 + 226699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51432505501 - 2⁹ = 51432504989 is a prime.

It is a super-2 number, since 2×51432505501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51432505571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37851 + ... + 322951.

It is an arithmetic number, because the mean of its divisors is an integer number (6924129723).

Almost surely, 2^51432505501 is an apocalyptic number.

It is an amenable number.

51432505501 is a deficient number, since it is larger than the sum of its proper divisors (3960532283).

51432505501 is a wasteful number, since it uses less digits than its factorization.

51432505501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298991.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 51432505501 in words is "fifty-one billion, four hundred thirty-two million, five hundred five thousand, five hundred one".