57421511 has 4 divisors (see below), whose sum is σ = 65624592. Its totient is φ = 49218432.

The previous prime is 57421499. The next prime is 57421519. The reversal of 57421511 is 11512475.

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 57421511 - 2¹⁰ = 57420487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57421519) 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, 4101530 + ... + 4101543.

It is an arithmetic number, because the mean of its divisors is an integer number (16406148).

Almost surely, 2^57421511 is an apocalyptic number.

57421511 is a deficient number, since it is larger than the sum of its proper divisors (8203081).

57421511 is an equidigital number, since it uses as much as digits as its factorization.

57421511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203080.

The product of its digits is 1400, while the sum is 26.

The square root of 57421511 is about 7577.6982653046. The cubic root of 57421511 is about 385.7964308224.

Adding to 57421511 its reverse (11512475), we get a palindrome (68933986).

The spelling of 57421511 in words is "fifty-seven million, four hundred twenty-one thousand, five hundred eleven".