57405511 has 2 divisors, whose sum is σ = 57405512. Its totient is φ = 57405510.

The previous prime is 57405497. The next prime is 57405527. The reversal of 57405511 is 11550475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57405511 - 2²¹ = 55308359 is a prime.

It is a super-2 number, since 2×57405511² = 6590785386342242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57405511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57405541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28702755 + 28702756.

It is an arithmetic number, because the mean of its divisors is an integer number (28702756).

Almost surely, 2^57405511 is an apocalyptic number.

57405511 is a deficient number, since it is larger than the sum of its proper divisors (1).

57405511 is an equidigital number, since it uses as much as digits as its factorization.

57405511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 57405511 is about 7576.6424621992. The cubic root of 57405511 is about 385.7605945640.

Adding to 57405511 its reverse (11550475), we get a palindrome (68955986).

The spelling of 57405511 in words is "fifty-seven million, four hundred five thousand, five hundred eleven".