55213597 has 2 divisors, whose sum is σ = 55213598. Its totient is φ = 55213596.

The previous prime is 55213577. The next prime is 55213607. The reversal of 55213597 is 79531255.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55145476 + 68121 = 7426^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 55213597 - 2¹⁹ = 54689309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55213517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606798 + 27606799.

It is an arithmetic number, because the mean of its divisors is an integer number (27606799).

Almost surely, 2^55213597 is an apocalyptic number.

It is an amenable number.

55213597 is a deficient number, since it is larger than the sum of its proper divisors (1).

55213597 is an equidigital number, since it uses as much as digits as its factorization.

55213597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 37.

The square root of 55213597 is about 7430.5852394007. The cubic root of 55213597 is about 380.7869127162.

The spelling of 55213597 in words is "fifty-five million, two hundred thirteen thousand, five hundred ninety-seven".