75103234721 has 8 divisors (see below), whose sum is σ = 77530905600. Its totient is φ = 72675875520.

The previous prime is 75103234697. The next prime is 75103234727. The reversal of 75103234721 is 12743230157.

It is a happy number.

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 75103234721 - 2³⁰ = 74029492897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75103234727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473945 + ... + 612233.

It is an arithmetic number, because the mean of its divisors is an integer number (9691363200).

Almost surely, 2^75103234721 is an apocalyptic number.

It is an amenable number.

75103234721 is a deficient number, since it is larger than the sum of its proper divisors (2427670879).

75103234721 is a wasteful number, since it uses less digits than its factorization.

75103234721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155839.

The product of its (nonzero) digits is 35280, while the sum is 35.

Adding to 75103234721 its reverse (12743230157), we get a palindrome (87846464878).

The spelling of 75103234721 in words is "seventy-five billion, one hundred three million, two hundred thirty-four thousand, seven hundred twenty-one".