75057321 has 4 divisors (see below), whose sum is σ = 100076432. Its totient is φ = 50038212.

The previous prime is 75057319. The next prime is 75057343. The reversal of 75057321 is 12375057.

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 not a de Polignac number, because 75057321 - 2¹ = 75057319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75057361) 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, 12509551 + ... + 12509556.

It is an arithmetic number, because the mean of its divisors is an integer number (25019108).

Almost surely, 2^75057321 is an apocalyptic number.

It is an amenable number.

75057321 is a deficient number, since it is larger than the sum of its proper divisors (25019111).

75057321 is a wasteful number, since it uses less digits than its factorization.

75057321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25019110.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 75057321 is about 8663.5628352312. The cubic root of 75057321 is about 421.8237417449.

The spelling of 75057321 in words is "seventy-five million, fifty-seven thousand, three hundred twenty-one".