57219061 has 2 divisors, whose sum is σ = 57219062. Its totient is φ = 57219060.

The previous prime is 57219053. The next prime is 57219077. The reversal of 57219061 is 16091275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49434961 + 7784100 = 7031^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 57219061 - 2³ = 57219053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57219361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28609530 + 28609531.

It is an arithmetic number, because the mean of its divisors is an integer number (28609531).

Almost surely, 2^57219061 is an apocalyptic number.

It is an amenable number.

57219061 is a deficient number, since it is larger than the sum of its proper divisors (1).

57219061 is an equidigital number, since it uses as much as digits as its factorization.

57219061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 57219061 is about 7564.3281922455. The cubic root of 57219061 is about 385.3424983918.

The spelling of 57219061 in words is "fifty-seven million, two hundred nineteen thousand, sixty-one".