55423665 has 96 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 24796800.

The previous prime is 55423663. The next prime is 55423699. The reversal of 55423665 is 56632455.

It is a happy number.

It is not a de Polignac number, because 55423665 - 2¹ = 55423663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55423661) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 667714 + ... + 667796.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^55423665 is an apocalyptic number.

55423665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55423665 is an abundant number, since it is smaller than the sum of its proper divisors (57794895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55423665 is a wasteful number, since it uses less digits than its factorization.

55423665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 192 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 55423665 is about 7444.7071802724. The cubic root of 55423665 is about 381.2692209247.

The spelling of 55423665 in words is "fifty-five million, four hundred twenty-three thousand, six hundred sixty-five".