51515404541 has 8 divisors (see below), whose sum is σ = 51828180600. Its totient is φ = 51203572992.

The previous prime is 51515404517. The next prime is 51515404561. The reversal of 51515404541 is 14540451515.

It can be written as a sum of positive squares in 4 ways, for example, as 1372998916 + 50142405625 = 37054^2 + 223925^2 .

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 51515404541 - 2⁶ = 51515404477 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 (51515404561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126560 + ... + 345033.

It is an arithmetic number, because the mean of its divisors is an integer number (6478522575).

Almost surely, 2^51515404541 is an apocalyptic number.

It is an amenable number.

51515404541 is a deficient number, since it is larger than the sum of its proper divisors (312776059).

51515404541 is a wasteful number, since it uses less digits than its factorization.

51515404541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472255.

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 51515404541 in words is "fifty-one billion, five hundred fifteen million, four hundred four thousand, five hundred forty-one".