57348781 has 4 divisors (see below), whose sum is σ = 65541472. Its totient is φ = 49156092.

The previous prime is 57348773. The next prime is 57348833. The reversal of 57348781 is 18784375.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57348781 - 2³ = 57348773 is a prime.

It is a super-2 number, since 2×57348781² = 6577765364371922, 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 (57348721) 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, 4096335 + ... + 4096348.

It is an arithmetic number, because the mean of its divisors is an integer number (16385368).

Almost surely, 2^57348781 is an apocalyptic number.

It is an amenable number.

57348781 is a deficient number, since it is larger than the sum of its proper divisors (8192691).

57348781 is an equidigital number, since it uses as much as digits as its factorization.

57348781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192690.

The product of its digits is 188160, while the sum is 43.

The square root of 57348781 is about 7572.8977941076. The cubic root of 57348781 is about 385.6334789440.

The spelling of 57348781 in words is "fifty-seven million, three hundred forty-eight thousand, seven hundred eighty-one".