55381170 has 64 divisors (see below), whose sum is σ = 144031104. Its totient is φ = 13547520.

The previous prime is 55381163. The next prime is 55381177. The reversal of 55381170 is 7118355.

It is an interprime number because it is at equal distance from previous prime (55381163) and next prime (55381177).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55381177) 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, 81954 + ... + 82626.

It is an arithmetic number, because the mean of its divisors is an integer number (2250486).

Almost surely, 2^55381170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55381170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72015552).

55381170 is an abundant number, since it is smaller than the sum of its proper divisors (88649934).

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

55381170 is a wasteful number, since it uses less digits than its factorization.

55381170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 55381170 is about 7441.8525919290. The cubic root of 55381170 is about 381.1717524626.

The spelling of 55381170 in words is "fifty-five million, three hundred eighty-one thousand, one hundred seventy".