55172270 has 8 divisors (see below), whose sum is σ = 99310104. Its totient is φ = 22068904.

The previous prime is 55172269. The next prime is 55172279. The reversal of 55172270 is 7227155.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55172279) 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, 2758604 + ... + 2758623.

It is an arithmetic number, because the mean of its divisors is an integer number (12413763).

Almost surely, 2^55172270 is an apocalyptic number.

55172270 is a deficient number, since it is larger than the sum of its proper divisors (44137834).

55172270 is a wasteful number, since it uses less digits than its factorization.

55172270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517234.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 55172270 is about 7427.8038477063. The cubic root of 55172270 is about 380.6918835355.

The spelling of 55172270 in words is "fifty-five million, one hundred seventy-two thousand, two hundred seventy".