45120231 has 24 divisors (see below), whose sum is σ = 73884720. Its totient is φ = 26303616.

The previous prime is 45120209. The next prime is 45120239. The reversal of 45120231 is 13202154.

It is not a de Polignac number, because 45120231 - 2⁶ = 45120167 is a prime.

It is a super-2 number, since 2×45120231² = 4071670490986722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45120239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7926 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (3078530).

Almost surely, 2^45120231 is an apocalyptic number.

45120231 is a deficient number, since it is larger than the sum of its proper divisors (28764489).

45120231 is a wasteful number, since it uses less digits than its factorization.

45120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20335 (or 20332 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 45120231 is about 6717.1594442889. The cubic root of 45120231 is about 356.0058256632.

Adding to 45120231 its reverse (13202154), we get a palindrome (58322385).

The spelling of 45120231 in words is "forty-five million, one hundred twenty thousand, two hundred thirty-one".