75052821 has 8 divisors (see below), whose sum is σ = 100219680. Its totient is φ = 49960592.

The previous prime is 75052819. The next prime is 75052871. The reversal of 75052821 is 12825057.

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 75052821 - 2¹ = 75052819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75052801) 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, 16266 + ... + 20363.

It is an arithmetic number, because the mean of its divisors is an integer number (12527460).

Almost surely, 2^75052821 is an apocalyptic number.

It is an amenable number.

75052821 is a deficient number, since it is larger than the sum of its proper divisors (25166859).

75052821 is a wasteful number, since it uses less digits than its factorization.

75052821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37315.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 75052821 is about 8663.3031229433. The cubic root of 75052821 is about 421.8153115445.

Adding to 75052821 its reverse (12825057), we get a palindrome (87877878).

The spelling of 75052821 in words is "seventy-five million, fifty-two thousand, eight hundred twenty-one".