2555211021 has 16 divisors (see below), whose sum is σ = 3721515840. Its totient is φ = 1546593920.

The previous prime is 2555211017. The next prime is 2555211023. The reversal of 2555211021 is 1201125552.

It is a cyclic number.

It is not a de Polignac number, because 2555211021 - 2² = 2555211017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2555210982 and 2555211000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555211023) 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, 24576 + ... + 75593.

It is an arithmetic number, because the mean of its divisors is an integer number (232594740).

Almost surely, 2^2555211021 is an apocalyptic number.

It is an amenable number.

2555211021 is a deficient number, since it is larger than the sum of its proper divisors (1166304819).

2555211021 is a wasteful number, since it uses less digits than its factorization.

2555211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100956.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2555211021 is about 50549.0951551064. The cubic root of 2555211021 is about 1367.1271999861.

Adding to 2555211021 its reverse (1201125552), we get a palindrome (3756336573).

The spelling of 2555211021 in words is "two billion, five hundred fifty-five million, two hundred eleven thousand, twenty-one".