57551213 has 2 divisors, whose sum is σ = 57551214. Its totient is φ = 57551212.

The previous prime is 57551203. The next prime is 57551257. The reversal of 57551213 is 31215575.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55920484 + 1630729 = 7478^2 + 1277^2 .

It is a cyclic number.

It is not a de Polignac number, because 57551213 - 2⁶ = 57551149 is a prime.

It is equal to p_3425348 and since 57551213 and 3425348 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57551203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28775606 + 28775607.

It is an arithmetic number, because the mean of its divisors is an integer number (28775607).

Almost surely, 2^57551213 is an apocalyptic number.

It is an amenable number.

57551213 is a deficient number, since it is larger than the sum of its proper divisors (1).

57551213 is an equidigital number, since it uses as much as digits as its factorization.

57551213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 29.

The square root of 57551213 is about 7586.2515776897. The cubic root of 57551213 is about 386.0866875560.

Adding to 57551213 its reverse (31215575), we get a palindrome (88766788).

The spelling of 57551213 in words is "fifty-seven million, five hundred fifty-one thousand, two hundred thirteen".