55170897 has 4 divisors (see below), whose sum is σ = 73561200. Its totient is φ = 36780596.

The previous prime is 55170887. The next prime is 55170919. The reversal of 55170897 is 79807155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55170897 - 2⁴ = 55170881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55170877) 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, 9195147 + ... + 9195152.

It is an arithmetic number, because the mean of its divisors is an integer number (18390300).

Almost surely, 2^55170897 is an apocalyptic number.

It is an amenable number.

55170897 is a deficient number, since it is larger than the sum of its proper divisors (18390303).

55170897 is a wasteful number, since it uses less digits than its factorization.

55170897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390302.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 55170897 is about 7427.7114241198. The cubic root of 55170897 is about 380.6887255826.

The spelling of 55170897 in words is "fifty-five million, one hundred seventy thousand, eight hundred ninety-seven".