45409531 has 2 divisors, whose sum is σ = 45409532. Its totient is φ = 45409530.

The previous prime is 45409523. The next prime is 45409543. The reversal of 45409531 is 13590454.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45409531 - 2³ = 45409523 is a prime.

It is a super-3 number, since 3×45409531³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 45409493 and 45409502.

It is not a weakly prime, because it can be changed into another prime (45409561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22704765 + 22704766.

It is an arithmetic number, because the mean of its divisors is an integer number (22704766).

Almost surely, 2^45409531 is an apocalyptic number.

45409531 is a deficient number, since it is larger than the sum of its proper divisors (1).

45409531 is an equidigital number, since it uses as much as digits as its factorization.

45409531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 45409531 is about 6738.6594364161. The cubic root of 45409531 is about 356.7650796451.

Adding to 45409531 its reverse (13590454), we get a palindrome (58999985).

The spelling of 45409531 in words is "forty-five million, four hundred nine thousand, five hundred thirty-one".