2756232021 has 16 divisors (see below), whose sum is σ = 3713883840. Its totient is φ = 1818136320.

The previous prime is 2756232013. The next prime is 2756232047. The reversal of 2756232021 is 1202326572.

It is not a de Polignac number, because 2756232021 - 2³ = 2756232013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2756232021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2756232091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96925 + ... + 122093.

It is an arithmetic number, because the mean of its divisors is an integer number (232117740).

Almost surely, 2^2756232021 is an apocalyptic number.

It is an amenable number.

2756232021 is a deficient number, since it is larger than the sum of its proper divisors (957651819).

2756232021 is a wasteful number, since it uses less digits than its factorization.

2756232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25556.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 2756232021 is about 52499.8287711493. The cubic root of 2756232021 is about 1402.0771922078.

Adding to 2756232021 its reverse (1202326572), we get a palindrome (3958558593).

The spelling of 2756232021 in words is "two billion, seven hundred fifty-six million, two hundred thirty-two thousand, twenty-one".