51332535451 has 4 divisors (see below), whose sum is σ = 52719901312. Its totient is φ = 49945169592.

The previous prime is 51332535431. The next prime is 51332535481. The reversal of 51332535451 is 15453523315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15453523315 = 5 ⋅3090704663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51332535451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1387365823 = 51332535451 / (5 + 1 + 3 + 3 + 2 + 5 + 3 + 5 + 4 + 5 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51332535451.

It is not an unprimeable number, because it can be changed into a prime (51332535431) 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, 693682875 + ... + 693682948.

It is an arithmetic number, because the mean of its divisors is an integer number (13179975328).

Almost surely, 2^51332535451 is an apocalyptic number.

51332535451 is a deficient number, since it is larger than the sum of its proper divisors (1387365861).

51332535451 is a wasteful number, since it uses less digits than its factorization.

51332535451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387365860.

The product of its digits is 135000, while the sum is 37.

The spelling of 51332535451 in words is "fifty-one billion, three hundred thirty-two million, five hundred thirty-five thousand, four hundred fifty-one".