545137081 has 2 divisors, whose sum is σ = 545137082. Its totient is φ = 545137080.

The previous prime is 545137057. The next prime is 545137121. The reversal of 545137081 is 180731545.

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., 393625600 + 151511481 = 19840^2 + 12309^2 .

It is a cyclic number.

It is not a de Polignac number, because 545137081 - 2²¹ = 543039929 is a prime.

It is a super-2 number, since 2×545137081² = 594348874162401122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545137031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272568540 + 272568541.

It is an arithmetic number, because the mean of its divisors is an integer number (272568541).

Almost surely, 2^545137081 is an apocalyptic number.

It is an amenable number.

545137081 is a deficient number, since it is larger than the sum of its proper divisors (1).

545137081 is an equidigital number, since it uses as much as digits as its factorization.

545137081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 545137081 is about 23348.1708277115. The cubic root of 545137081 is about 816.8993956924.

The spelling of 545137081 in words is "five hundred forty-five million, one hundred thirty-seven thousand, eighty-one".