45150821 has 4 divisors (see below), whose sum is σ = 47527200. Its totient is φ = 42774444.

The previous prime is 45150779. The next prime is 45150829. The reversal of 45150821 is 12805154.

45150821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12805154 = 2 ⋅6402577.

It is a cyclic number.

It is not a de Polignac number, because 45150821 - 2⁶ = 45150757 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 (45150829) 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 3 ways as a sum of consecutive naturals, for example, 1188161 + ... + 1188198.

It is an arithmetic number, because the mean of its divisors is an integer number (11881800).

Almost surely, 2^45150821 is an apocalyptic number.

It is an amenable number.

45150821 is a deficient number, since it is larger than the sum of its proper divisors (2376379).

45150821 is a wasteful number, since it uses less digits than its factorization.

45150821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376378.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 45150821 is about 6719.4360626469. The cubic root of 45150821 is about 356.0862608163.

Adding to 45150821 its reverse (12805154), we get a palindrome (57955975).

The spelling of 45150821 in words is "forty-five million, one hundred fifty thousand, eight hundred twenty-one".