55523397 has 4 divisors (see below), whose sum is σ = 74031200. Its totient is φ = 37015596.

The previous prime is 55523393. The next prime is 55523399. The reversal of 55523397 is 79332555.

55523397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 55523397 - 2² = 55523393 is a prime.

It is a super-2 number, since 2×55523397² = 6165695228839218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55523393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9253897 + ... + 9253902.

It is an arithmetic number, because the mean of its divisors is an integer number (18507800).

Almost surely, 2^55523397 is an apocalyptic number.

It is an amenable number.

55523397 is a deficient number, since it is larger than the sum of its proper divisors (18507803).

55523397 is a wasteful number, since it uses less digits than its factorization.

55523397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18507802.

The product of its digits is 141750, while the sum is 39.

The square root of 55523397 is about 7451.4023512356. The cubic root of 55523397 is about 381.4977752608.

The spelling of 55523397 in words is "fifty-five million, five hundred twenty-three thousand, three hundred ninety-seven".