57103421 has 2 divisors, whose sum is σ = 57103422. Its totient is φ = 57103420.

The previous prime is 57103399. The next prime is 57103433. The reversal of 57103421 is 12430175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44222500 + 12880921 = 6650^2 + 3589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57103421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57103121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28551710 + 28551711.

It is an arithmetic number, because the mean of its divisors is an integer number (28551711).

Almost surely, 2^57103421 is an apocalyptic number.

It is an amenable number.

57103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

57103421 is an equidigital number, since it uses as much as digits as its factorization.

57103421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 57103421 is about 7556.6805543175. The cubic root of 57103421 is about 385.0827302958.

Adding to 57103421 its reverse (12430175), we get a palindrome (69533596).

The spelling of 57103421 in words is "fifty-seven million, one hundred three thousand, four hundred twenty-one".