73145251 has 2 divisors, whose sum is σ = 73145252. Its totient is φ = 73145250.

The previous prime is 73145209. The next prime is 73145257. The reversal of 73145251 is 15254137.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73145251 - 2¹³ = 73137059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73145257) 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, 36572625 + 36572626.

It is an arithmetic number, because the mean of its divisors is an integer number (36572626).

Almost surely, 2^73145251 is an apocalyptic number.

73145251 is a deficient number, since it is larger than the sum of its proper divisors (1).

73145251 is an equidigital number, since it uses as much as digits as its factorization.

73145251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 73145251 is about 8552.4996930722. The cubic root of 73145251 is about 418.2109292345.

Adding to 73145251 its reverse (15254137), we get a palindrome (88399388).

The spelling of 73145251 in words is "seventy-three million, one hundred forty-five thousand, two hundred fifty-one".