55112397 has 4 divisors (see below), whose sum is σ = 73483200. Its totient is φ = 36741596.

The previous prime is 55112377. The next prime is 55112399. The reversal of 55112397 is 79321155.

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 a de Polignac number, because none of the positive numbers 2^k-55112397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55112399) 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, 9185397 + ... + 9185402.

It is an arithmetic number, because the mean of its divisors is an integer number (18370800).

Almost surely, 2^55112397 is an apocalyptic number.

It is an amenable number.

55112397 is a deficient number, since it is larger than the sum of its proper divisors (18370803).

55112397 is a wasteful number, since it uses less digits than its factorization.

55112397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18370802.

The product of its digits is 9450, while the sum is 33.

The square root of 55112397 is about 7423.7724237749. The cubic root of 55112397 is about 380.5541246264.

The spelling of 55112397 in words is "fifty-five million, one hundred twelve thousand, three hundred ninety-seven".