632213021 has 20 divisors (see below), whose sum is σ = 719893500. Its totient is φ = 554547840.

The previous prime is 632213009. The next prime is 632213033. The reversal of 632213021 is 120312236.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (632213009) and next prime (632213033).

It can be written as a sum of positive squares in 2 ways, for example, as 228765625 + 403447396 = 15125^2 + 20086^2 .

It is not a de Polignac number, because 632213021 - 2⁶ = 632212957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 632212984 and 632213002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632213041) 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 in 19 ways as a sum of consecutive naturals, for example, 423845 + ... + 425333.

It is an arithmetic number, because the mean of its divisors is an integer number (35994675).

Almost surely, 2^632213021 is an apocalyptic number.

It is an amenable number.

632213021 is a deficient number, since it is larger than the sum of its proper divisors (87680479).

632213021 is an equidigital number, since it uses as much as digits as its factorization.

632213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 632213021 is about 25143.8465832100. The cubic root of 632213021 is about 858.2644922030.

Adding to 632213021 its reverse (120312236), we get a palindrome (752525257).

The spelling of 632213021 in words is "six hundred thirty-two million, two hundred thirteen thousand, twenty-one".