57405613 has 4 divisors (see below), whose sum is σ = 57932380. Its totient is φ = 56878848.

The previous prime is 57405599. The next prime is 57405629. The reversal of 57405613 is 31650475.

57405613 = 5357² + 5358².

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

It can be written as a sum of positive squares in 2 ways, for example, as 28708164 + 28697449 = 5358^2 + 5357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57405613 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 (57405653) 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, 263220 + ... + 263437.

It is an arithmetic number, because the mean of its divisors is an integer number (14483095).

Almost surely, 2^57405613 is an apocalyptic number.

57405613 is the 5358-th centered square number.

It is an amenable number.

57405613 is a deficient number, since it is larger than the sum of its proper divisors (526767).

57405613 is a wasteful number, since it uses less digits than its factorization.

57405613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526766.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 57405613 is about 7576.6491934100. The cubic root of 57405613 is about 385.7608230413.

The spelling of 57405613 in words is "fifty-seven million, four hundred five thousand, six hundred thirteen".