45205531 has 4 divisors (see below), whose sum is σ = 51663472. Its totient is φ = 38747592.

The previous prime is 45205483. The next prime is 45205547. The reversal of 45205531 is 13550254.

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 45205531 - 2⁹ = 45205019 is a prime.

It is a super-2 number, since 2×45205531² = 4087080065983922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45205496 and 45205505.

It is not an unprimeable number, because it can be changed into a prime (45205561) 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, 3228960 + ... + 3228973.

It is an arithmetic number, because the mean of its divisors is an integer number (12915868).

Almost surely, 2^45205531 is an apocalyptic number.

45205531 is a deficient number, since it is larger than the sum of its proper divisors (6457941).

45205531 is an equidigital number, since it uses as much as digits as its factorization.

45205531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457940.

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

The square root of 45205531 is about 6723.5058563223. The cubic root of 45205531 is about 356.2300279765.

Adding to 45205531 its reverse (13550254), we get a palindrome (58755785).

The spelling of 45205531 in words is "forty-five million, two hundred five thousand, five hundred thirty-one".