2051021551273 has 8 divisors (see below), whose sum is σ = 2098889646656. Its totient is φ = 2003161179600.

The previous prime is 2051021551247. The next prime is 2051021551277. The reversal of 2051021551273 is 3721551201502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051021551273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051021551277) 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, 1391898 + ... + 2457523.

It is an arithmetic number, because the mean of its divisors is an integer number (262361205832).

Almost surely, 2^{2051021551273} is an apocalyptic number.

It is an amenable number.

2051021551273 is a deficient number, since it is larger than the sum of its proper divisors (47868095383).

2051021551273 is a wasteful number, since it uses less digits than its factorization.

2051021551273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861855.

The product of its (nonzero) digits is 21000, while the sum is 34.

Adding to 2051021551273 its reverse (3721551201502), we get a palindrome (5772572752775).

The spelling of 2051021551273 in words is "two trillion, fifty-one billion, twenty-one million, five hundred fifty-one thousand, two hundred seventy-three".