51510420541 has 4 divisors (see below), whose sum is σ = 51557635584. Its totient is φ = 51463205500.

The previous prime is 51510420517. The next prime is 51510420553. The reversal of 51510420541 is 14502401515.

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 not a de Polignac number, because 51510420541 - 2⁷ = 51510420413 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 (51510490541) 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, 23605885 + ... + 23608066.

It is an arithmetic number, because the mean of its divisors is an integer number (12889408896).

Almost surely, 2^51510420541 is an apocalyptic number.

It is an amenable number.

51510420541 is a deficient number, since it is larger than the sum of its proper divisors (47215043).

51510420541 is a wasteful number, since it uses less digits than its factorization.

51510420541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47215042.

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 51510420541 in words is "fifty-one billion, five hundred ten million, four hundred twenty thousand, five hundred forty-one".