75230781 has 8 divisors (see below), whose sum is σ = 100462560. Its totient is φ = 50076432.

The previous prime is 75230761. The next prime is 75230783. The reversal of 75230781 is 18703257.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75230781 - 2¹⁹ = 74706493 is a prime.

It is a super-2 number, since 2×75230781² = 11319340819739922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75230783) 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, 17050 + ... + 21003.

It is an arithmetic number, because the mean of its divisors is an integer number (12557820).

Almost surely, 2^75230781 is an apocalyptic number.

It is an amenable number.

75230781 is a deficient number, since it is larger than the sum of its proper divisors (25231779).

75230781 is a wasteful number, since it uses less digits than its factorization.

75230781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38715.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 75230781 is about 8673.5679509646. The cubic root of 75230781 is about 422.1484413734.

The spelling of 75230781 in words is "seventy-five million, two hundred thirty thousand, seven hundred eighty-one".