57878531 has 2 divisors, whose sum is σ = 57878532. Its totient is φ = 57878530.

The previous prime is 57878507. The next prime is 57878533. The reversal of 57878531 is 13587875.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57878531 - 2⁶ = 57878467 is a prime.

It is a super-2 number, since 2×57878531² = 6699848701435922, which contains 22 as substring.

Together with 57878533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57878533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28939265 + 28939266.

It is an arithmetic number, because the mean of its divisors is an integer number (28939266).

Almost surely, 2^57878531 is an apocalyptic number.

57878531 is a deficient number, since it is larger than the sum of its proper divisors (1).

57878531 is an equidigital number, since it uses as much as digits as its factorization.

57878531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 44.

The square root of 57878531 is about 7607.7940955312. The cubic root of 57878531 is about 386.8172501911.

The spelling of 57878531 in words is "fifty-seven million, eight hundred seventy-eight thousand, five hundred thirty-one".