75071381 has 32 divisors (see below), whose sum is σ = 96940800. Its totient is φ = 57624000.

The previous prime is 75071377. The next prime is 75071393. The reversal of 75071381 is 18317057.

It is not a de Polignac number, because 75071381 - 2² = 75071377 is a prime.

It is a super-2 number, since 2×75071381² = 11271424490494322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75071341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380975 + ... + 381171.

It is an arithmetic number, because the mean of its divisors is an integer number (3029400).

Almost surely, 2^75071381 is an apocalyptic number.

It is an amenable number.

75071381 is a deficient number, since it is larger than the sum of its proper divisors (21869419).

75071381 is a wasteful number, since it uses less digits than its factorization.

75071381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 75071381 is about 8664.3742416865. The cubic root of 75071381 is about 421.8500792668.

It can be divided in two parts, 7507 and 1381, that added together give a palindrome (8888).

The spelling of 75071381 in words is "seventy-five million, seventy-one thousand, three hundred eighty-one".