45440231 has 4 divisors (see below), whose sum is σ = 45691464. Its totient is φ = 45189000.

The previous prime is 45440189. The next prime is 45440233. The reversal of 45440231 is 13204454.

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

It is a cyclic number.

It is not a de Polignac number, because 45440231 - 2¹⁸ = 45178087 is a prime.

It is a super-2 number, since 2×45440231² = 4129629186666722, 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 = 45440197 and 45440206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45440233) 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, 125345 + ... + 125706.

It is an arithmetic number, because the mean of its divisors is an integer number (11422866).

Almost surely, 2^45440231 is an apocalyptic number.

45440231 is a deficient number, since it is larger than the sum of its proper divisors (251233).

45440231 is a wasteful number, since it uses less digits than its factorization.

45440231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251232.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 45440231 is about 6740.9369526795. The cubic root of 45440231 is about 356.8454608659.

Adding to 45440231 its reverse (13204454), we get a palindrome (58644685).

The spelling of 45440231 in words is "forty-five million, four hundred forty thousand, two hundred thirty-one".