55217150 has 12 divisors (see below), whose sum is σ = 102703992. Its totient is φ = 22086840.

The previous prime is 55217137. The next prime is 55217159. The reversal of 55217150 is 5171255.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55217159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 552122 + ... + 552221.

It is an arithmetic number, because the mean of its divisors is an integer number (8558666).

Almost surely, 2^55217150 is an apocalyptic number.

55217150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55217150 is a deficient number, since it is larger than the sum of its proper divisors (47486842).

55217150 is a wasteful number, since it uses less digits than its factorization.

55217150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104355 (or 1104350 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 55217150 is about 7430.8243149734. The cubic root of 55217150 is about 380.7950804319.

The spelling of 55217150 in words is "fifty-five million, two hundred seventeen thousand, one hundred fifty".