45344421 has 16 divisors (see below), whose sum is σ = 67341120. Its totient is φ = 30155760.

The previous prime is 45344407. The next prime is 45344443. The reversal of 45344421 is 12444354.

It is a happy number.

It is not a de Polignac number, because 45344421 - 2⁶ = 45344357 is a prime.

It is a super-2 number, since 2×45344421² = 4112233031650482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45344921) 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, 10626 + ... + 14268.

It is an arithmetic number, because the mean of its divisors is an integer number (4208820).

Almost surely, 2^45344421 is an apocalyptic number.

It is an amenable number.

45344421 is a deficient number, since it is larger than the sum of its proper divisors (21996699).

45344421 is a wasteful number, since it uses less digits than its factorization.

45344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113 (or 4107 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 45344421 is about 6733.8266238447. The cubic root of 45344421 is about 356.5944834077.

Adding to 45344421 its reverse (12444354), we get a palindrome (57788775).

The spelling of 45344421 in words is "forty-five million, three hundred forty-four thousand, four hundred twenty-one".