45531421 has 32 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 37728768.

The previous prime is 45531419. The next prime is 45531427. The reversal of 45531421 is 12413554.

It is a happy number.

45531421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45531421 - 2¹ = 45531419 is a prime.

It is a super-2 number, since 2×45531421² = 4146220596558482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45531427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 511545 + ... + 511633.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^45531421 is an apocalyptic number.

It is an amenable number.

45531421 is a deficient number, since it is larger than the sum of its proper divisors (8900579).

45531421 is a wasteful number, since it uses less digits than its factorization.

45531421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213.

The product of its digits is 2400, while the sum is 25.

The square root of 45531421 is about 6747.6974591337. The cubic root of 45531421 is about 357.0840086123.

Adding to 45531421 its reverse (12413554), we get a palindrome (57944975).

The spelling of 45531421 in words is "forty-five million, five hundred thirty-one thousand, four hundred twenty-one".