55097599 has 2 divisors, whose sum is σ = 55097600. Its totient is φ = 55097598.

The previous prime is 55097591. The next prime is 55097611. The reversal of 55097599 is 99579055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55097599 - 2³ = 55097591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55097591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27548799 + 27548800.

It is an arithmetic number, because the mean of its divisors is an integer number (27548800).

Almost surely, 2^55097599 is an apocalyptic number.

55097599 is a deficient number, since it is larger than the sum of its proper divisors (1).

55097599 is an equidigital number, since it uses as much as digits as its factorization.

55097599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 637875, while the sum is 49.

The square root of 55097599 is about 7422.7756937685. The cubic root of 55097599 is about 380.5200612436.

It can be divided in two parts, 55097 and 599, that added together give a square (55696 = 236²).

The spelling of 55097599 in words is "fifty-five million, ninety-seven thousand, five hundred ninety-nine".