55402164 has 48 divisors (see below), whose sum is σ = 144244800. Its totient is φ = 18389088.

The previous prime is 55402163. The next prime is 55402169. The reversal of 55402164 is 46120455.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55402163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28099 + ... + 30005.

It is an arithmetic number, because the mean of its divisors is an integer number (3005100).

Almost surely, 2^55402164 is an apocalyptic number.

55402164 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55402164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72122400).

55402164 is an abundant number, since it is smaller than the sum of its proper divisors (88842636).

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

55402164 is a wasteful number, since it uses less digits than its factorization.

55402164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 55402164 is about 7443.2629941444. The cubic root of 55402164 is about 381.2199114837.

The spelling of 55402164 in words is "fifty-five million, four hundred two thousand, one hundred sixty-four".