73551145 has 8 divisors (see below), whose sum is σ = 88376904. Its totient is φ = 58763904.

The previous prime is 73551143. The next prime is 73551151. The reversal of 73551145 is 54115537.

It can be written as a sum of positive squares in 4 ways, for example, as 13271449 + 60279696 = 3643^2 + 7764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73551145 - 2¹ = 73551143 is a prime.

It is a super-2 number, since 2×73551145² = 10819541861622050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73551143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5244 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (11047113).

Almost surely, 2^73551145 is an apocalyptic number.

It is an amenable number.

73551145 is a deficient number, since it is larger than the sum of its proper divisors (14825759).

73551145 is a wasteful number, since it uses less digits than its factorization.

73551145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19259.

The product of its digits is 10500, while the sum is 31.

The square root of 73551145 is about 8576.1964179932. The cubic root of 73551145 is about 418.9830745247.

The spelling of 73551145 in words is "seventy-three million, five hundred fifty-one thousand, one hundred forty-five".