5655232021 has 2 divisors, whose sum is σ = 5655232022. Its totient is φ = 5655232020.

The previous prime is 5655232007. The next prime is 5655232039. The reversal of 5655232021 is 1202325565.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5214861796 + 440370225 = 72214^2 + 20985^2 .

It is a cyclic number.

It is not a de Polignac number, because 5655232021 - 2⁷ = 5655231893 is a prime.

It is a super-2 number, since 2×5655232021² = 63963298422687488882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5655232091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2827616010 + 2827616011.

It is an arithmetic number, because the mean of its divisors is an integer number (2827616011).

Almost surely, 2^5655232021 is an apocalyptic number.

It is an amenable number.

5655232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5655232021 is an equidigital number, since it uses as much as digits as its factorization.

5655232021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 5655232021 is about 75201.2767245344. The cubic root of 5655232021 is about 1781.6270966780.

Adding to 5655232021 its reverse (1202325565), we get a palindrome (6857557586).

The spelling of 5655232021 in words is "five billion, six hundred fifty-five million, two hundred thirty-two thousand, twenty-one".