45781481 has 2 divisors, whose sum is σ = 45781482. Its totient is φ = 45781480.

The previous prime is 45781447. The next prime is 45781529. The reversal of 45781481 is 18418754.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30250000 + 15531481 = 5500^2 + 3941^2 .

It is a cyclic number.

It is not a de Polignac number, because 45781481 - 2¹⁰ = 45780457 is a prime.

It is a super-2 number, since 2×45781481² = 4191888005106722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45781441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22890740 + 22890741.

It is an arithmetic number, because the mean of its divisors is an integer number (22890741).

Almost surely, 2^45781481 is an apocalyptic number.

It is an amenable number.

45781481 is a deficient number, since it is larger than the sum of its proper divisors (1).

45781481 is an equidigital number, since it uses as much as digits as its factorization.

45781481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 38.

The square root of 45781481 is about 6766.2013715230. The cubic root of 45781481 is about 357.7365210719.

The spelling of 45781481 in words is "forty-five million, seven hundred eighty-one thousand, four hundred eighty-one".