55097823 has 32 divisors (see below), whose sum is σ = 82566144. Its totient is φ = 32400000.

The previous prime is 55097821. The next prime is 55097849. The reversal of 55097823 is 32879055.

It is not a de Polignac number, because 55097823 - 2¹ = 55097821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55097821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203178 + ... + 203448.

It is an arithmetic number, because the mean of its divisors is an integer number (2580192).

Almost surely, 2^55097823 is an apocalyptic number.

55097823 is a deficient number, since it is larger than the sum of its proper divisors (27468321).

55097823 is a wasteful number, since it uses less digits than its factorization.

55097823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 55097823 is about 7422.7907824483. The cubic root of 55097823 is about 380.5205769126.

The spelling of 55097823 in words is "fifty-five million, ninety-seven thousand, eight hundred twenty-three".