55047172 has 6 divisors (see below), whose sum is σ = 96332558. Its totient is φ = 27523584.

The previous prime is 55047169. The next prime is 55047203. The reversal of 55047172 is 27174055.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 3437316 = 7184^2 + 1854^2 .

It is a super-2 number, since 2×55047172² = 6060382290395168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6880893 + ... + 6880900.

Almost surely, 2^55047172 is an apocalyptic number.

It is an amenable number.

55047172 is a deficient number, since it is larger than the sum of its proper divisors (41285386).

55047172 is a wasteful number, since it uses less digits than its factorization.

55047172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13761797 (or 13761795 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 55047172 is about 7419.3781410574. The cubic root of 55047172 is about 380.4039379617.

The spelling of 55047172 in words is "fifty-five million, forty-seven thousand, one hundred seventy-two".