51105503245 has 8 divisors (see below), whose sum is σ = 61398504216. Its totient is φ = 40836469056.

The previous prime is 51105503231. The next prime is 51105503261. The reversal of 51105503245 is 54230550115.

It can be written as a sum of positive squares in 4 ways, for example, as 7446654436 + 43658848809 = 86294^2 + 208947^2 .

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 51105503245 - 2⁹ = 51105502733 is a prime.

It is a super-2 number, since 2×51105503245² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5987002 + ... + 5995531.

It is an arithmetic number, because the mean of its divisors is an integer number (7674813027).

Almost surely, 2^51105503245 is an apocalyptic number.

It is an amenable number.

51105503245 is a deficient number, since it is larger than the sum of its proper divisors (10293000971).

51105503245 is a wasteful number, since it uses less digits than its factorization.

51105503245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11983391.

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

The spelling of 51105503245 in words is "fifty-one billion, one hundred five million, five hundred three thousand, two hundred forty-five".