75019481 has 4 divisors (see below), whose sum is σ = 75206964. Its totient is φ = 74832000.

The previous prime is 75019421. The next prime is 75019489. The reversal of 75019481 is 18491057.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37319881 + 37699600 = 6109^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 75019481 - 2²² = 70825177 is a prime.

It is a super-2 number, since 2×75019481² = 11255845059018722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75019489) 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, 93140 + ... + 93941.

It is an arithmetic number, because the mean of its divisors is an integer number (18801741).

Almost surely, 2^75019481 is an apocalyptic number.

It is an amenable number.

75019481 is a deficient number, since it is larger than the sum of its proper divisors (187483).

75019481 is a wasteful number, since it uses less digits than its factorization.

75019481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187482.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 75019481 is about 8661.3787008767. The cubic root of 75019481 is about 421.7528426272.

The spelling of 75019481 in words is "seventy-five million, nineteen thousand, four hundred eighty-one".