75081381 has 16 divisors (see below), whose sum is σ = 101523840. Its totient is φ = 49351680.

The previous prime is 75081353. The next prime is 75081403. The reversal of 75081381 is 18318057.

It is not a de Polignac number, because 75081381 - 2⁶ = 75081317 is a prime.

It is a super-2 number, since 2×75081381² = 11274427545734322, 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 (75081341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81240 + ... + 82158.

It is an arithmetic number, because the mean of its divisors is an integer number (6345240).

Almost surely, 2^75081381 is an apocalyptic number.

It is an amenable number.

75081381 is a deficient number, since it is larger than the sum of its proper divisors (26442459).

75081381 is a wasteful number, since it uses less digits than its factorization.

75081381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 75081381 is about 8664.9512981897. The cubic root of 75081381 is about 421.8688095004.

The spelling of 75081381 in words is "seventy-five million, eighty-one thousand, three hundred eighty-one".