55213607 has 2 divisors, whose sum is σ = 55213608. Its totient is φ = 55213606.

The previous prime is 55213597. The next prime is 55213619. The reversal of 55213607 is 70631255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55213607 - 2⁸ = 55213351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55213607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55213667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606803 + 27606804.

It is an arithmetic number, because the mean of its divisors is an integer number (27606804).

Almost surely, 2^55213607 is an apocalyptic number.

55213607 is a deficient number, since it is larger than the sum of its proper divisors (1).

55213607 is an equidigital number, since it uses as much as digits as its factorization.

55213607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 55213607 is about 7430.5859122952. The cubic root of 55213607 is about 380.7869357049.

The spelling of 55213607 in words is "fifty-five million, two hundred thirteen thousand, six hundred seven".