75831321 has 4 divisors (see below), whose sum is σ = 101108432. Its totient is φ = 50554212.

The previous prime is 75831307. The next prime is 75831341. The reversal of 75831321 is 12313857.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12313857 = 3 ⋅4104619.

It is not a de Polignac number, because 75831321 - 2⁹ = 75830809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75831341) 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, 12638551 + ... + 12638556.

It is an arithmetic number, because the mean of its divisors is an integer number (25277108).

Almost surely, 2^75831321 is an apocalyptic number.

It is an amenable number.

75831321 is a deficient number, since it is larger than the sum of its proper divisors (25277111).

75831321 is a wasteful number, since it uses less digits than its factorization.

75831321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25277110.

The product of its digits is 5040, while the sum is 30.

The square root of 75831321 is about 8708.1181089831. The cubic root of 75831321 is about 423.2687515235.

The spelling of 75831321 in words is "seventy-five million, eight hundred thirty-one thousand, three hundred twenty-one".