51421153505103 has 24 divisors (see below), whose sum is σ = 75171924867312. Its totient is φ = 33866825935488.

The previous prime is 51421153505101. The next prime is 51421153505131. The reversal of 51421153505103 is 30150535112415.

51421153505103 is a `hidden beast` number, since 5 + 1 + 4 + 2 + 11 + 535 + 0 + 5 + 103 = 666.

It is not a de Polignac number, because 51421153505103 - 2¹ = 51421153505101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421153505101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27089275 + ... + 28925267.

It is an arithmetic number, because the mean of its divisors is an integer number (3132163536138).

Almost surely, 2^{51421153505103} is an apocalyptic number.

51421153505103 is a deficient number, since it is larger than the sum of its proper divisors (23750771362209).

51421153505103 is a wasteful number, since it uses less digits than its factorization.

51421153505103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873575 (or 1873572 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 51421153505103 its reverse (30150535112415), we get a palindrome (81571688617518).

The spelling of 51421153505103 in words is "fifty-one trillion, four hundred twenty-one billion, one hundred fifty-three million, five hundred five thousand, one hundred three".