45781517 has 6 divisors (see below), whose sum is σ = 47415498. Its totient is φ = 44202032.

The previous prime is 45781481. The next prime is 45781529. The reversal of 45781517 is 71518754.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1771561 + 44009956 = 1331^2 + 6634^2 .

It is not a de Polignac number, because 45781517 - 2⁸ = 45781261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45781117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26378 + ... + 28059.

It is an arithmetic number, because the mean of its divisors is an integer number (7902583).

Almost surely, 2^45781517 is an apocalyptic number.

It is an amenable number.

45781517 is a deficient number, since it is larger than the sum of its proper divisors (1633981).

45781517 is an equidigital number, since it uses as much as digits as its factorization.

45781517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54495 (or 54466 counting only the distinct ones).

The product of its digits is 39200, while the sum is 38.

The square root of 45781517 is about 6766.2040318039. The cubic root of 45781517 is about 357.7366148399.

The spelling of 45781517 in words is "forty-five million, seven hundred eighty-one thousand, five hundred seventeen".