75140031221 has 4 divisors (see below), whose sum is σ = 75250046592. Its totient is φ = 75030015852.

The previous prime is 75140031191. The next prime is 75140031247. The reversal of 75140031221 is 12213004157.

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.

It is a cyclic number.

It is not a de Polignac number, because 75140031221 - 2¹⁰ = 75140030197 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 (75140031121) 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, 55006661 + ... + 55008026.

It is an arithmetic number, because the mean of its divisors is an integer number (18812511648).

Almost surely, 2^75140031221 is an apocalyptic number.

It is an amenable number.

75140031221 is a deficient number, since it is larger than the sum of its proper divisors (110015371).

75140031221 is a wasteful number, since it uses less digits than its factorization.

75140031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110015370.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 75140031221 its reverse (12213004157), we get a palindrome (87353035378).

The spelling of 75140031221 in words is "seventy-five billion, one hundred forty million, thirty-one thousand, two hundred twenty-one".