55101247 has 4 divisors (see below), whose sum is σ = 57001320. Its totient is φ = 53201176.

The previous prime is 55101227. The next prime is 55101289. The reversal of 55101247 is 74210155.

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 55101247 - 2⁷ = 55101119 is a prime.

It is a super-2 number, since 2×55101247² = 6072294841910018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55101217) 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, 949993 + ... + 950050.

It is an arithmetic number, because the mean of its divisors is an integer number (14250330).

Almost surely, 2^55101247 is an apocalyptic number.

55101247 is a deficient number, since it is larger than the sum of its proper divisors (1900073).

55101247 is a wasteful number, since it uses less digits than its factorization.

55101247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900072.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 55101247 is about 7423.0214198802. The cubic root of 55101247 is about 380.5284591083.

The spelling of 55101247 in words is "fifty-five million, one hundred one thousand, two hundred forty-seven".