45016781 has 2 divisors, whose sum is σ = 45016782. Its totient is φ = 45016780.

The previous prime is 45016771. The next prime is 45016817. The reversal of 45016781 is 18761054.

It is a happy number.

Together with next prime (45016817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43494025 + 1522756 = 6595^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 45016781 - 2⁶ = 45016717 is a prime.

It is a super-2 number, since 2×45016781² = 4053021143203922, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45016711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22508390 + 22508391.

It is an arithmetic number, because the mean of its divisors is an integer number (22508391).

Almost surely, 2^45016781 is an apocalyptic number.

It is an amenable number.

45016781 is a deficient number, since it is larger than the sum of its proper divisors (1).

45016781 is an equidigital number, since it uses as much as digits as its factorization.

45016781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 45016781 is about 6709.4545978045. The cubic root of 45016781 is about 355.7335384554.

The spelling of 45016781 in words is "forty-five million, sixteen thousand, seven hundred eighty-one".