55426247 has 4 divisors (see below), whose sum is σ = 56334936. Its totient is φ = 54517560.

The previous prime is 55426243. The next prime is 55426253. The reversal of 55426247 is 74262455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74262455 = 5 ⋅14852491.

It is a cyclic number.

It is not a de Polignac number, because 55426247 - 2² = 55426243 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 (55426243) 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, 454253 + ... + 454374.

It is an arithmetic number, because the mean of its divisors is an integer number (14083734).

Almost surely, 2^55426247 is an apocalyptic number.

55426247 is a deficient number, since it is larger than the sum of its proper divisors (908689).

55426247 is an equidigital number, since it uses as much as digits as its factorization.

55426247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908688.

The product of its digits is 67200, while the sum is 35.

The square root of 55426247 is about 7444.8805900431. The cubic root of 55426247 is about 381.2751415114.

The spelling of 55426247 in words is "fifty-five million, four hundred twenty-six thousand, two hundred forty-seven".