57016391 has 2 divisors, whose sum is σ = 57016392. Its totient is φ = 57016390.

The previous prime is 57016367. The next prime is 57016423. The reversal of 57016391 is 19361075.

It is an a-pointer prime, because the next prime (57016423) can be obtained adding 57016391 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57016391 - 2⁶ = 57016327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57015391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28508195 + 28508196.

It is an arithmetic number, because the mean of its divisors is an integer number (28508196).

Almost surely, 2^57016391 is an apocalyptic number.

57016391 is a deficient number, since it is larger than the sum of its proper divisors (1).

57016391 is an equidigital number, since it uses as much as digits as its factorization.

57016391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 57016391 is about 7550.9198777368. The cubic root of 57016391 is about 384.8869989385.

It can be divided in two parts, 570 and 16391, that added together give a palindrome (16961).

The spelling of 57016391 in words is "fifty-seven million, sixteen thousand, three hundred ninety-one".