73144501 has 4 divisors (see below), whose sum is σ = 73161900. Its totient is φ = 73127104.

The previous prime is 73144493. The next prime is 73144517. The reversal of 73144501 is 10544137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38452401 + 34692100 = 6201^2 + 5890^2 .

It is a cyclic number.

It is not a de Polignac number, because 73144501 - 2³ = 73144493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73144541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965 + ... + 12253.

It is an arithmetic number, because the mean of its divisors is an integer number (18290475).

Almost surely, 2^73144501 is an apocalyptic number.

It is an amenable number.

73144501 is a deficient number, since it is larger than the sum of its proper divisors (17399).

73144501 is a wasteful number, since it uses less digits than its factorization.

73144501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17398.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 73144501 is about 8552.4558461298. The cubic root of 73144501 is about 418.2094998445.

Adding to 73144501 its reverse (10544137), we get a palindrome (83688638).

The spelling of 73144501 in words is "seventy-three million, one hundred forty-four thousand, five hundred one".