57481591 has 4 divisors (see below), whose sum is σ = 57647592. Its totient is φ = 57315592.

The previous prime is 57481579. The next prime is 57481639. The reversal of 57481591 is 19518475.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 57481591 - 2¹³ = 57473399 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57481691) 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, 82480 + ... + 83173.

It is an arithmetic number, because the mean of its divisors is an integer number (14411898).

Almost surely, 2^57481591 is an apocalyptic number.

57481591 is a deficient number, since it is larger than the sum of its proper divisors (166001).

57481591 is a wasteful number, since it uses less digits than its factorization.

57481591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166000.

The product of its digits is 50400, while the sum is 40.

The square root of 57481591 is about 7581.6614933667. The cubic root of 57481591 is about 385.9309365731.

The spelling of 57481591 in words is "fifty-seven million, four hundred eighty-one thousand, five hundred ninety-one".