45540247 has 4 divisors (see below), whose sum is σ = 46164160. Its totient is φ = 44916336.

The previous prime is 45540233. The next prime is 45540251. The reversal of 45540247 is 74204554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74204554 = 2 ⋅37102277.

It is a cyclic number.

It is not a de Polignac number, because 45540247 - 2¹⁵ = 45507479 is a prime.

It is a super-3 number, since 3×45540247³ (a number of 24 digits) contains 333 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 (45540277) 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, 311847 + ... + 311992.

It is an arithmetic number, because the mean of its divisors is an integer number (11541040).

Almost surely, 2^45540247 is an apocalyptic number.

45540247 is a deficient number, since it is larger than the sum of its proper divisors (623913).

45540247 is an equidigital number, since it uses as much as digits as its factorization.

45540247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623912.

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 45540247 is about 6748.3514283120. The cubic root of 45540247 is about 357.1070800047.

The spelling of 45540247 in words is "forty-five million, five hundred forty thousand, two hundred forty-seven".