45237321 has 6 divisors (see below), whose sum is σ = 65342810. Its totient is φ = 30158208.

The previous prime is 45237319. The next prime is 45237331. The reversal of 45237321 is 12373254.

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 881721 = 6660^2 + 939^2 .

It is not a de Polignac number, because 45237321 - 2¹ = 45237319 is a prime.

It is a super-2 number, since 2×45237321² = 4092830422514082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45237301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2513176 + ... + 2513193.

Almost surely, 2^45237321 is an apocalyptic number.

It is an amenable number.

45237321 is a deficient number, since it is larger than the sum of its proper divisors (20105489).

45237321 is a wasteful number, since it uses less digits than its factorization.

45237321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026375 (or 5026372 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 45237321 is about 6725.8695348631. The cubic root of 45237321 is about 356.3135125913.

It can be divided in two parts, 452 and 37321, that added together give a palindrome (37773).

The spelling of 45237321 in words is "forty-five million, two hundred thirty-seven thousand, three hundred twenty-one".