2051028229491 has 12 divisors (see below), whose sum is σ = 2962812584160. Its totient is φ = 1367252344080.

The previous prime is 2051028229489. The next prime is 2051028229507. The reversal of 2051028229491 is 1949228201502.

2051028229491 is a `hidden beast` number, since 2 + 0 + 510 + 28 + 2 + 29 + 4 + 91 = 666.

It is not a de Polignac number, because 2051028229491 - 2¹ = 2051028229489 is a prime.

It is a super-3 number, since 3×2051028229491³ (a number of 38 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2051028229091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8187156 + ... + 8433953.

It is an arithmetic number, because the mean of its divisors is an integer number (246901048680).

Almost surely, 2^{2051028229491} is an apocalyptic number.

2051028229491 is a deficient number, since it is larger than the sum of its proper divisors (911784354669).

2051028229491 is a wasteful number, since it uses less digits than its factorization.

2051028229491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16634826 (or 16634823 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 2051028229491 in words is "two trillion, fifty-one billion, twenty-eight million, two hundred twenty-nine thousand, four hundred ninety-one".