2235256021 has 2 divisors, whose sum is σ = 2235256022. Its totient is φ = 2235256020.

The previous prime is 2235256003. The next prime is 2235256027. The reversal of 2235256021 is 1206525322.

2235256021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1268356996 + 966899025 = 35614^2 + 31095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2235256021 - 2⁹ = 2235255509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2235256027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1117628010 + 1117628011.

It is an arithmetic number, because the mean of its divisors is an integer number (1117628011).

Almost surely, 2^2235256021 is an apocalyptic number.

It is an amenable number.

2235256021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2235256021 is an equidigital number, since it uses as much as digits as its factorization.

2235256021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2235256021 is about 47278.4942759390. The cubic root of 2235256021 is about 1307.5021885029.

The spelling of 2235256021 in words is "two billion, two hundred thirty-five million, two hundred fifty-six thousand, twenty-one".