51551210505 has 16 divisors (see below), whose sum is σ = 82487456064. Its totient is φ = 27492139200.

The previous prime is 51551210449. The next prime is 51551210507. The reversal of 51551210505 is 50501215515.

It is not a de Polignac number, because 51551210505 - 2¹⁵ = 51551177737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51551210507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134055 + ... + 347955.

It is an arithmetic number, because the mean of its divisors is an integer number (5155466004).

Almost surely, 2^51551210505 is an apocalyptic number.

It is an amenable number.

51551210505 is a deficient number, since it is larger than the sum of its proper divisors (30936245559).

51551210505 is a wasteful number, since it uses less digits than its factorization.

51551210505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229976.

The product of its (nonzero) digits is 6250, while the sum is 30.

The spelling of 51551210505 in words is "fifty-one billion, five hundred fifty-one million, two hundred ten thousand, five hundred five".