55195020 has 144 divisors (see below), whose sum is σ = 178502688. Its totient is φ = 14307840.

The previous prime is 55195013. The next prime is 55195027. The reversal of 55195020 is 2059155.

55195020 is a `hidden beast` number, since 551 + 95 + 0 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (55195013) and next prime (55195027).

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

It is not an unprimeable number, because it can be changed into a prime (55195027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199122 + ... + 199398.

It is an arithmetic number, because the mean of its divisors is an integer number (1239602).

Almost surely, 2^55195020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55195020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89251344).

55195020 is an abundant number, since it is smaller than the sum of its proper divisors (123307668).

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

55195020 is a wasteful number, since it uses less digits than its factorization.

55195020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 55195020 is about 7429.3350981094. The cubic root of 55195020 is about 380.7442017877.

The spelling of 55195020 in words is "fifty-five million, one hundred ninety-five thousand, twenty".