51101603533 has 4 divisors (see below), whose sum is σ = 51236436640. Its totient is φ = 50966770428.

The previous prime is 51101603491. The next prime is 51101603561. The reversal of 51101603533 is 33530610115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51101603533 is a prime.

It is a super-2 number, since 2×51101603533² (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 (51101603563) 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, 67415985 + ... + 67416742.

It is an arithmetic number, because the mean of its divisors is an integer number (12809109160).

Almost surely, 2^51101603533 is an apocalyptic number.

It is an amenable number.

51101603533 is a deficient number, since it is larger than the sum of its proper divisors (134833107).

51101603533 is a wasteful number, since it uses less digits than its factorization.

51101603533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134833106.

The product of its (nonzero) digits is 4050, while the sum is 28.

The spelling of 51101603533 in words is "fifty-one billion, one hundred one million, six hundred three thousand, five hundred thirty-three".