55412399 has 4 divisors (see below), whose sum is σ = 63328464. Its totient is φ = 47496336.

The previous prime is 55412381. The next prime is 55412429. The reversal of 55412399 is 99321455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55412399 - 2⁸ = 55412143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55412699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3958022 + ... + 3958035.

It is an arithmetic number, because the mean of its divisors is an integer number (15832116).

Almost surely, 2^55412399 is an apocalyptic number.

55412399 is a deficient number, since it is larger than the sum of its proper divisors (7916065).

55412399 is an equidigital number, since it uses as much as digits as its factorization.

55412399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916064.

The product of its digits is 48600, while the sum is 38.

The square root of 55412399 is about 7443.9504968800. The cubic root of 55412399 is about 381.2433855701.

The spelling of 55412399 in words is "fifty-five million, four hundred twelve thousand, three hundred ninety-nine".