45505231 has 4 divisors (see below), whose sum is σ = 45576864. Its totient is φ = 45433600.

The previous prime is 45505193. The next prime is 45505237. The reversal of 45505231 is 13250554.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45505231 is a prime.

It is a super-2 number, since 2×45505231² = 4141452096726722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45505196 and 45505205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45505237) 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, 34855 + ... + 36136.

It is an arithmetic number, because the mean of its divisors is an integer number (11394216).

Almost surely, 2^45505231 is an apocalyptic number.

45505231 is a deficient number, since it is larger than the sum of its proper divisors (71633).

45505231 is an equidigital number, since it uses as much as digits as its factorization.

45505231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71632.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 45505231 is about 6745.7565179897. The cubic root of 45505231 is about 357.0155297196.

Adding to 45505231 its reverse (13250554), we get a palindrome (58755785).

The spelling of 45505231 in words is "forty-five million, five hundred five thousand, two hundred thirty-one".