51421452143687 has 4 divisors (see below), whose sum is σ = 51421579148496. Its totient is φ = 51421325138880.

The previous prime is 51421452143683. The next prime is 51421452143701. The reversal of 51421452143687 is 78634125412415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51421452143687 - 2² = 51421452143683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421452143681) 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, 62893139 + ... + 63705492.

It is an arithmetic number, because the mean of its divisors is an integer number (12855394787124).

Almost surely, 2^{51421452143687} is an apocalyptic number.

51421452143687 is a deficient number, since it is larger than the sum of its proper divisors (127004809).

51421452143687 is a wasteful number, since it uses less digits than its factorization.

51421452143687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127004808.

The product of its digits is 6451200, while the sum is 53.

The spelling of 51421452143687 in words is "fifty-one trillion, four hundred twenty-one billion, four hundred fifty-two million, one hundred forty-three thousand, six hundred eighty-seven".