73995551 has 4 divisors (see below), whose sum is σ = 84566352. Its totient is φ = 63424752.

The previous prime is 73995547. The next prime is 73995569. The reversal of 73995551 is 15559937.

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

It is a cyclic number.

It is not a de Polignac number, because 73995551 - 2² = 73995547 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 (73995511) 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 in 3 ways as a sum of consecutive naturals, for example, 5285390 + ... + 5285403.

It is an arithmetic number, because the mean of its divisors is an integer number (21141588).

Almost surely, 2^73995551 is an apocalyptic number.

73995551 is a deficient number, since it is larger than the sum of its proper divisors (10570801).

73995551 is a wasteful number, since it uses less digits than its factorization.

73995551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10570800.

The product of its digits is 212625, while the sum is 44.

The square root of 73995551 is about 8602.0666702834. The cubic root of 73995551 is about 419.8252315190.

The spelling of 73995551 in words is "seventy-three million, nine hundred ninety-five thousand, five hundred fifty-one".