47217555 has 48 divisors (see below), whose sum is σ = 102046464. Its totient is φ = 19621440.

The previous prime is 47217553. The next prime is 47217581. The reversal of 47217555 is 55571274.

It is not a de Polignac number, because 47217555 - 2¹ = 47217553 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (47217553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3349 + ... + 10278.

It is an arithmetic number, because the mean of its divisors is an integer number (2125968).

Almost surely, 2^47217555 is an apocalyptic number.

47217555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47217555 is an abundant number, since it is smaller than the sum of its proper divisors (54828909).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47217555 is a wasteful number, since it uses less digits than its factorization.

47217555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13656 (or 13653 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 47217555 is about 6871.5031106738. The cubic root of 47217555 is about 361.4385724612.

The spelling of 47217555 in words is "forty-seven million, two hundred seventeen thousand, five hundred fifty-five".