55212455407 has 4 divisors (see below), whose sum is σ = 55990095696. Its totient is φ = 54434815120.

The previous prime is 55212455369. The next prime is 55212455423. The reversal of 55212455407 is 70455421255.

It is a happy number.

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 55212455407 - 2¹⁹ = 55211931119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55212455407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212455437) 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, 388820038 + ... + 388820179.

It is an arithmetic number, because the mean of its divisors is an integer number (13997523924).

Almost surely, 2^55212455407 is an apocalyptic number.

55212455407 is a deficient number, since it is larger than the sum of its proper divisors (777640289).

55212455407 is an equidigital number, since it uses as much as digits as its factorization.

55212455407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777640288.

The product of its (nonzero) digits is 280000, while the sum is 40.

The spelling of 55212455407 in words is "fifty-five billion, two hundred twelve million, four hundred fifty-five thousand, four hundred seven".