53071581 has 8 divisors (see below), whose sum is σ = 70893664. Its totient is φ = 35315280.

The previous prime is 53071573. The next prime is 53071583. The reversal of 53071581 is 18517035.

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

It is not a de Polignac number, because 53071581 - 2³ = 53071573 is a prime.

It is a super-2 number, since 2×53071581² = 5633185419679122, 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 (53071583) 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, 14530 + ... + 17811.

It is an arithmetic number, because the mean of its divisors is an integer number (8861708).

Almost surely, 2^53071581 is an apocalyptic number.

It is an amenable number.

53071581 is a deficient number, since it is larger than the sum of its proper divisors (17822083).

53071581 is a wasteful number, since it uses less digits than its factorization.

53071581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32891.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 53071581 is about 7285.0244337270. The cubic root of 53071581 is about 375.7976054432.

The spelling of 53071581 in words is "fifty-three million, seventy-one thousand, five hundred eighty-one".