57504781 has 4 divisors (see below), whose sum is σ = 57528000. Its totient is φ = 57481564.

The previous prime is 57504743. The next prime is 57504793. The reversal of 57504781 is 18740575.

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 57504781 - 2⁹ = 57504269 is a prime.

It is a super-2 number, since 2×57504781² = 6613599675715922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57504781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57534781) 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, 7381 + ... + 13018.

It is an arithmetic number, because the mean of its divisors is an integer number (14382000).

Almost surely, 2^57504781 is an apocalyptic number.

It is an amenable number.

57504781 is a deficient number, since it is larger than the sum of its proper divisors (23219).

57504781 is a wasteful number, since it uses less digits than its factorization.

57504781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23218.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 57504781 is about 7583.1906873031. The cubic root of 57504781 is about 385.9828287528.

It can be divided in two parts, 575047 and 81, that added together give a triangular number (575128 = T₁₀₇₂).

The spelling of 57504781 in words is "fifty-seven million, five hundred four thousand, seven hundred eighty-one".