55219971 has 8 divisors (see below), whose sum is σ = 75193344. Its totient is φ = 36029960.

The previous prime is 55219949. The next prime is 55219991. The reversal of 55219971 is 17991255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55219971 - 2⁵ = 55219939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55219991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195675 + ... + 195956.

It is an arithmetic number, because the mean of its divisors is an integer number (9399168).

Almost surely, 2^55219971 is an apocalyptic number.

55219971 is a deficient number, since it is larger than the sum of its proper divisors (19973373).

55219971 is a wasteful number, since it uses less digits than its factorization.

55219971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391681.

The product of its digits is 28350, while the sum is 39.

The square root of 55219971 is about 7431.0141299825. The cubic root of 55219971 is about 380.8015651601.

The spelling of 55219971 in words is "fifty-five million, two hundred nineteen thousand, nine hundred seventy-one".