75565381 has 4 divisors (see below), whose sum is σ = 76160512. Its totient is φ = 74970252.

The previous prime is 75565367. The next prime is 75565403. The reversal of 75565381 is 18356557.

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 75565381 - 2¹¹ = 75563333 is a prime.

It is a super-2 number, since 2×75565381² = 11420253611350322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75565351) 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, 297375 + ... + 297628.

It is an arithmetic number, because the mean of its divisors is an integer number (19040128).

Almost surely, 2^75565381 is an apocalyptic number.

It is an amenable number.

75565381 is a deficient number, since it is larger than the sum of its proper divisors (595131).

75565381 is a wasteful number, since it uses less digits than its factorization.

75565381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595130.

The product of its digits is 126000, while the sum is 40.

The square root of 75565381 is about 8692.8350381219. The cubic root of 75565381 is about 422.7733716265.

The spelling of 75565381 in words is "seventy-five million, five hundred sixty-five thousand, three hundred eighty-one".