45331421 has 4 divisors (see below), whose sum is σ = 45424992. Its totient is φ = 45237852.

The previous prime is 45331409. The next prime is 45331423. The reversal of 45331421 is 12413354.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45331421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45331423) 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 3 ways as a sum of consecutive naturals, for example, 46055 + ... + 47028.

It is an arithmetic number, because the mean of its divisors is an integer number (11356248).

Almost surely, 2^45331421 is an apocalyptic number.

It is an amenable number.

45331421 is a deficient number, since it is larger than the sum of its proper divisors (93571).

45331421 is an equidigital number, since it uses as much as digits as its factorization.

45331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93570.

The product of its digits is 1440, while the sum is 23.

The square root of 45331421 is about 6732.8612788324. The cubic root of 45331421 is about 356.5604022479.

Adding to 45331421 its reverse (12413354), we get a palindrome (57744775).

The spelling of 45331421 in words is "forty-five million, three hundred thirty-one thousand, four hundred twenty-one".