45430021 has 16 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 35731008.

The previous prime is 45430003. The next prime is 45430027. The reversal of 45430021 is 12003454.

It is a cyclic number.

It is not a de Polignac number, because 45430021 - 2²¹ = 43332869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45430027) 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, 14895 + ... + 17683.

It is an arithmetic number, because the mean of its divisors is an integer number (3515400).

Almost surely, 2^45430021 is an apocalyptic number.

It is an amenable number.

45430021 is a deficient number, since it is larger than the sum of its proper divisors (10816379).

45430021 is a wasteful number, since it uses less digits than its factorization.

45430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988.

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

The square root of 45430021 is about 6740.1795970137. The cubic root of 45430021 is about 356.8187322381.

Adding to 45430021 its reverse (12003454), we get a palindrome (57433475).

The spelling of 45430021 in words is "forty-five million, four hundred thirty thousand, twenty-one".