51210513423551 has 16 divisors (see below), whose sum is σ = 53759403924480. Its totient is φ = 48717711719040.

The previous prime is 51210513423541. The next prime is 51210513423581. The reversal of 51210513423551 is 15532431501215.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51210513423551 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 (51210513423541) 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, 116575220 + ... + 117013686.

It is an arithmetic number, because the mean of its divisors is an integer number (3359962745280).

Almost surely, 2^{51210513423551} is an apocalyptic number.

51210513423551 is a deficient number, since it is larger than the sum of its proper divisors (2548890500929).

51210513423551 is a wasteful number, since it uses less digits than its factorization.

51210513423551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502414.

The product of its (nonzero) digits is 90000, while the sum is 38.

Adding to 51210513423551 its reverse (15532431501215), we get a palindrome (66742944924766).

The spelling of 51210513423551 in words is "fifty-one trillion, two hundred ten billion, five hundred thirteen million, four hundred twenty-three thousand, five hundred fifty-one".