45442221 has 8 divisors (see below), whose sum is σ = 66097824. Its totient is φ = 27540720.

The previous prime is 45442157. The next prime is 45442277. The reversal of 45442221 is 12224454.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45442221 - 2⁶ = 45442157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45442191 and 45442200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45442291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688486 + ... + 688551.

It is an arithmetic number, because the mean of its divisors is an integer number (8262228).

Almost surely, 2^45442221 is an apocalyptic number.

It is an amenable number.

45442221 is a deficient number, since it is larger than the sum of its proper divisors (20655603).

45442221 is a wasteful number, since it uses less digits than its factorization.

45442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377051.

The product of its digits is 2560, while the sum is 24.

The square root of 45442221 is about 6741.0845566570. The cubic root of 45442221 is about 356.8506699951.

Adding to 45442221 its reverse (12224454), we get a palindrome (57666675).

The spelling of 45442221 in words is "forty-five million, four hundred forty-two thousand, two hundred twenty-one".