55172661 has 8 divisors (see below), whose sum is σ = 75551904. Its totient is φ = 35787600.

The previous prime is 55172659. The next prime is 55172669. The reversal of 55172661 is 16627155.

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

It is not a de Polignac number, because 55172661 - 2¹ = 55172659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55172669) 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, 248415 + ... + 248636.

It is an arithmetic number, because the mean of its divisors is an integer number (9443988).

Almost surely, 2^55172661 is an apocalyptic number.

It is an amenable number.

55172661 is a deficient number, since it is larger than the sum of its proper divisors (20379243).

55172661 is a wasteful number, since it uses less digits than its factorization.

55172661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497091.

The product of its digits is 12600, while the sum is 33.

The square root of 55172661 is about 7427.8301676869. The cubic root of 55172661 is about 380.6927828410.

The spelling of 55172661 in words is "fifty-five million, one hundred seventy-two thousand, six hundred sixty-one".