45136321 has 4 divisors (see below), whose sum is σ = 45161172. Its totient is φ = 45111472.

The previous prime is 45136307. The next prime is 45136339. The reversal of 45136321 is 12363154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25644096 + 19492225 = 5064^2 + 4415^2 .

It is a cyclic number.

It is not a de Polignac number, because 45136321 - 2¹³ = 45128129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45136361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9466 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (11290293).

Almost surely, 2^45136321 is an apocalyptic number.

It is an amenable number.

45136321 is a deficient number, since it is larger than the sum of its proper divisors (24851).

45136321 is a wasteful number, since it uses less digits than its factorization.

45136321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24850.

The product of its digits is 2160, while the sum is 25.

The square root of 45136321 is about 6718.3570164141. The cubic root of 45136321 is about 356.0481381902.

Adding to 45136321 its reverse (12363154), we get a palindrome (57499475).

The spelling of 45136321 in words is "forty-five million, one hundred thirty-six thousand, three hundred twenty-one".