45311521 has 2 divisors, whose sum is σ = 45311522. Its totient is φ = 45311520.

The previous prime is 45311509. The next prime is 45311527. The reversal of 45311521 is 12511354.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39551521 + 5760000 = 6289^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 45311521 - 2⁵ = 45311489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45311492 and 45311501.

It is not a weakly prime, because it can be changed into another prime (45311527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22655760 + 22655761.

It is an arithmetic number, because the mean of its divisors is an integer number (22655761).

Almost surely, 2^45311521 is an apocalyptic number.

It is an amenable number.

45311521 is a deficient number, since it is larger than the sum of its proper divisors (1).

45311521 is an equidigital number, since it uses as much as digits as its factorization.

45311521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 45311521 is about 6731.3832902309. The cubic root of 45311521 is about 356.5082192338.

Adding to 45311521 its reverse (12511354), we get a palindrome (57822875).

The spelling of 45311521 in words is "forty-five million, three hundred eleven thousand, five hundred twenty-one".