45232021 has 2 divisors, whose sum is σ = 45232022. Its totient is φ = 45232020.

The previous prime is 45232013. The next prime is 45232037. The reversal of 45232021 is 12023254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 1473796 = 6615^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 45232021 - 2³ = 45232013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45232021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45232051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22616010 + 22616011.

It is an arithmetic number, because the mean of its divisors is an integer number (22616011).

Almost surely, 2^45232021 is an apocalyptic number.

It is an amenable number.

45232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45232021 is an equidigital number, since it uses as much as digits as its factorization.

45232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 45232021 is about 6725.4755222215. The cubic root of 45232021 is about 356.2995968293.

Adding to 45232021 its reverse (12023254), we get a palindrome (57255275).

The spelling of 45232021 in words is "forty-five million, two hundred thirty-two thousand, twenty-one".