51021341551 has 8 divisors (see below), whose sum is σ = 51770996144. Its totient is φ = 50273058240.

The previous prime is 51021341521. The next prime is 51021341563. The reversal of 51021341551 is 15514312015.

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 51021341551 - 2⁹ = 51021341039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021341521) 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, 267741 + ... + 416806.

It is an arithmetic number, because the mean of its divisors is an integer number (6471374518).

Almost surely, 2^51021341551 is an apocalyptic number.

51021341551 is a deficient number, since it is larger than the sum of its proper divisors (749654593).

51021341551 is a wasteful number, since it uses less digits than its factorization.

51021341551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685641.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 51021341551 its reverse (15514312015), we get a palindrome (66535653566).

The spelling of 51021341551 in words is "fifty-one billion, twenty-one million, three hundred forty-one thousand, five hundred fifty-one".