2140551021 has 16 divisors (see below), whose sum is σ = 3264307200. Its totient is φ = 1222228848.

The previous prime is 2140551011. The next prime is 2140551029. The reversal of 2140551021 is 1201550412.

It is not a de Polignac number, because 2140551021 - 2⁶ = 2140550957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140551029) 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, 10941 + ... + 66338.

It is an arithmetic number, because the mean of its divisors is an integer number (204019200).

Almost surely, 2^2140551021 is an apocalyptic number.

2140551021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2140551021 is a deficient number, since it is larger than the sum of its proper divisors (1123756179).

2140551021 is a wasteful number, since it uses less digits than its factorization.

2140551021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78608.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2140551021 is about 46266.0893203651. The cubic root of 2140551021 is about 1288.7693371048.

The spelling of 2140551021 in words is "two billion, one hundred forty million, five hundred fifty-one thousand, twenty-one".