45032231 has 4 divisors (see below), whose sum is σ = 45574872. Its totient is φ = 44489592.

The previous prime is 45032209. The next prime is 45032263. The reversal of 45032231 is 13223054.

It is a happy number.

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-45032231 is a prime.

It is a super-2 number, since 2×45032231² = 4055803657674722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45032431) 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, 271196 + ... + 271361.

It is an arithmetic number, because the mean of its divisors is an integer number (11393718).

Almost surely, 2^45032231 is an apocalyptic number.

45032231 is a deficient number, since it is larger than the sum of its proper divisors (542641).

45032231 is an equidigital number, since it uses as much as digits as its factorization.

45032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542640.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 45032231 is about 6710.6058593841. The cubic root of 45032231 is about 355.7742303515.

Adding to 45032231 its reverse (13223054), we get a palindrome (58255285).

The spelling of 45032231 in words is "forty-five million, thirty-two thousand, two hundred thirty-one".