73215061 has 2 divisors, whose sum is σ = 73215062. Its totient is φ = 73215060.

The previous prime is 73215041. The next prime is 73215091. The reversal of 73215061 is 16051237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 19412836 = 7335^2 + 4406^2 .

It is a cyclic number.

It is not a de Polignac number, because 73215061 - 2⁵ = 73215029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73215011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36607530 + 36607531.

It is an arithmetic number, because the mean of its divisors is an integer number (36607531).

Almost surely, 2^73215061 is an apocalyptic number.

It is an amenable number.

73215061 is a deficient number, since it is larger than the sum of its proper divisors (1).

73215061 is an equidigital number, since it uses as much as digits as its factorization.

73215061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 73215061 is about 8556.5799826800. The cubic root of 73215061 is about 418.3439340957.

Adding to 73215061 its reverse (16051237), we get a palindrome (89266298).

The spelling of 73215061 in words is "seventy-three million, two hundred fifteen thousand, sixty-one".