55172770 has 16 divisors (see below), whose sum is σ = 104538240. Its totient is φ = 20907504.

The previous prime is 55172759. The next prime is 55172771. The reversal of 55172770 is 7727155.

It is not an unprimeable number, because it can be changed into a prime (55172771) 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, 145002 + ... + 145381.

It is an arithmetic number, because the mean of its divisors is an integer number (6533640).

Almost surely, 2^55172770 is an apocalyptic number.

55172770 is a deficient number, since it is larger than the sum of its proper divisors (49365470).

55172770 is a wasteful number, since it uses less digits than its factorization.

55172770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290409.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 55172770 is about 7427.8375049539. The cubic root of 55172770 is about 380.6930335417.

The spelling of 55172770 in words is "fifty-five million, one hundred seventy-two thousand, seven hundred seventy".